Products & specifications subject to change without notice. E. & O.E.
Advanced NDT Limited
Unit 4, Elgar Business Centre
Moseley Road
Hallow, Worcester
WR2 6NJ, UK
TEL: 44 (0) 1905 371 460
The Labino TrAc Finder ™ is the most powerful ALS lamp
with the widest light beam available on the market. The
TrAc Finder meets the needs of criminal investigators who
need an intense ALS with a wide light beam.
Ideal for Forensic Investigation and Crime scene
applications.
The TrAc Finder Crime Kit, The Nova LED Torch Lights & The
New MB Aris Kit - Alternative Light Sources (ALS) are
invaluable for detecting substances (forensic trace) at a crime
scene such as: body fluids (semen, urine, saliva, vaginal fluids, blood,
sweat etc.), bruising, hair, fibres, foot prints, fingerprints, Ninhydrine (treated
fingerprints), Super glue (treated fingerprints), Fluorescent dyes, powders,
stamps, markers, basic yellow 40, Cyanoacrylate, (SmartWater TM) and
general searching.
The Labino Nova Torch Crime Kit, based on our present
torch - Labino Torch light UVG2. The Nova Torch crime kit
includes 8 LED torches in different wavelengths as well as
coloured glasses and a tripod stand for hands free
operation. These forensic torches offer a perfect light
beam, very light weight and easy to use.
The Labino White Light Torch (L400). The Labino white LED
torch has a unique white luminance, which makes it
possible to see things that have not been possible before.
Ideal for Forensic / Crime Scene Applications.
Crime & Forensics
Labino helps you see what your eyes can’t see at a crime scene. At a
crime scene, fast and accurate detection of possible traces is of vital
importance. Many biological fluids are fluorescent in nature. When
such traces are illuminated with light of the right wavelength they
fluoresce and are detectable to the investigator. The degree to which
various substances become visible when using different filters depends
on the state of the substance and the surface on which the substance
exists. Deciding what light source to use to achieve the best result in
finding traces at the crime scene is an art. It takes years of experience
to learn what light to use depending on the occasion - it’s not an exact
science. New users using ALS (Alternative Light Sources) can of course
use combinations of light and goggles to determine the best option for
that occasion using trial and error until confidence and knowledge has
been built up. We make it possible for each user to put together their
own unique ALS kit. No crime scene looks the same. No crime scene
investigator uses the same method, but we can all share experiences
and learn from each other. Labino does offer professional training in
using light at a crime scene. All their trainings are held by Crime Scene
Investigators.
Detecting Blood Stains
There are several common ways to detect blood at the crime scene.
One very easy and quick way to detect blood is to use UV light.
When to use UV light to detect blood:
• Reduce the risk of collecting unnecessary stains
• Detect blood on dark, red or violet surfaces
• Find blood stains that are concealed by paint
Reduce the risk of collecting unnecessary stains
By using ultraviolet light it is possible to do an effective and quick
check for possible bloodstains. A bloodstain exposed to UV light
absorbs all light of that bandwidth and does not reflect back – that is
to say, it does not fluoresce in any way. Thus the stain will appear
black under UV. Although not a conclusive test for blood, it is an
effective presumptive test and can often eliminate the unnecessary
collection of stains that appear to be blood are actually from another
source.
Dark surfaces
The UV light source is also effective for providing sufficient contrast of
bloodstains that are found on red- or violet-coloured objects. Such
stains often fade into the background so well that it is impossible to
photograph them. Ultraviolet light often provides sufficient contrast
between the background and stain to allow the stains to be visualized
in a photograph.
Blood concealed by paint
It is not uncommon that a perpetrator of a crime tries to get rid of
potentially incriminating evidence. This may include painting over
areas that have been exposed to blood. To the naked human eye it is
next to impossible to see that a blood stain has been painted over. By
using ultraviolet light however, it is possible to detect blood stains that
have been concealed by paint
Under normal light, these stains are difficult to see and nearly
impossible to photograph.
A UV light source causes the stains to absorb all light and appear
black, while the background cloth lightens and reflects the light
Detecting Body Fluids
Detecting body fluids at the crime scene is a difficult task. Using a UV
light lamp however makes the job easier.
When to use UV light to detect body fluids:
Mark up the crime scene
Most stains from body fluids can be seen when using a high intensity
UV light. That is to say that most body fluids have some fluorescent
nature or reveal themselves in a special way when illuminated with UV
light. In most cases it is not possible to see such stains otherwise. The
most effective way of using the UV lamp is to use it to ‘mark’ the crime
scene. In other words, you mark all stains that could be useful ‘traces’.
When using an intense UV light it is also possible to see things at a
distance that otherwise would be nearly impossible to see. While the
UV light cannot confirm exactly what sort of stain you are looking at, it
does indicate where the stains or body fluids are. This makes it
possible to then take samples or perform further investigation, or
using an ALS kit to identify further.
Dark textiles
The high intensity UV light is a superb complement to more advanced
Alternative Light Sources due to the fact that ALS’s often have
limitations in finding body fluids on very dark textiles. High intensity
UV light is being used for example to examine the interior of black
coloured ‘robber’ masks, and to illuminate the sweat seen on the
inside of these.
What body fluids are fluorescent by nature?
• Semen (DNA)
• Vaginal secretion (DNA)
• Urine (DNA if it contains blood or other body fluid)
• Sweat (DNA)
• Saliva (DNA)
Semen
Semen is very fluorescent by nature and the fluorescence can be
observed on dark as well as light textiles when illuminated with an
intense UV light, without the need for using coloured goggles.
Vaginal secretion
Vaginal fluid is very hard to detect at all times, as it has a very weak
fluorescence.
Photo of belt with semen illuminated with WHITE Light & Photo of belt
with semen illuminated with UV Light
Photo of mask with saliva illuminated with WHITE Light & Photo of
mask with saliva illuminated with UV Light
Collecting Fingerprints
There are several methods of gathering fingerprints, and fluorescent
powder is used for some of them. Such powder is used in combination
with ultraviolet light and can be used on both non-porous smooth and
rough surfaces. We have also introduced the ground breaking
SuperXenon LUMI kit which is a specifically designed UV light and
Lumicyano solution making it ideal for finger print recognition.
Non-porous smooth surfaces:
• Painted or varnished surfaces
• Glass or Plexiglass
• Most plastics
Non-porous rough surfaces:
• Vinyl
• Leather
• Textured counter tops
• Textured surfaces
Use fluorescent powder and UV light when:
• The surface is dark, patterned or speckled
• The fingerprint is very weak
• The surface is not to be damaged by carbon
• The possible DNA on the stain is not to be damaged by carbon or
other powders
Dark, patterned or speckled surfaces
Putting dark powder on a dark patterned or speckled surface makes it
very hard to see the fingerprint. By developing the print with
fluorescent powder and a brush, and illuminating it with UV, the
fingerprint glows and is easy to photograph. This method is very
successful on beer cans for example.
Weak fingerprints
Fluorescent powder is very ‘delicate’ compared to common powders
used for fingerprints. It is therefore very useful when trying to detect
weak prints. If you develop the print with a very small amount of
fluorescent powder (and brush) and illuminate it with a UV light, the
fingerprint will glow and become therefore easy to photograph.
Avoid damaging surface with carbon
If you are going to develop a fingerprint on a surface that you do not
want to damage with carbon – i.e. a computer made of light plastic –
fluorescent powder is highly recommended. Use fluorescent powder
and a brush, and illuminate the print with UV. You need only use a very
small amount of fluorescent powder to achieve results, which makes it
useful on areas you can’t clean, like the inside of a computer for
example.
Avoid damaging fingerprints with carbon
Carbon eliminates the possibility of conducting a DNA test on a
fingerprint because it destroys the DNA. There might be a slight
possibility that there is sweat for example on the fingerprint. If that is
the case, then a UV lamp should be used first, without powder, to
illuminate the sweat on the print and indicate where a DNA sample
can be taken. When possible DNA has been collected from the print,
the fingerprint itself can be developed with the use of powder, and it
can then be photographed.
Fingerprints on a black cup
Fingerprints on a patterned cup
Fire Investigation
How is UV light used in arson investigations?
Arson investigators use ultraviolet light as a simple, reliable and cost
effective method of arson detection. Ultraviolet light is used to detect
information that is otherwise invisible to the human eye and to
uncover valuable information which can be used to solve a fire
investigation.
UV light is used to:
• Identify the presence of accelerants
• Identify pour patterns
Accelerants
UV light not only assists in identifying the presence of accelerants (a
substance that accelerates the spread of fire or makes a fire more
intense), but also in rapidly locating accelerant residues, and assisting
in locating the point of origin of the fire. The colour which accelerants
glow is affected by heat exposure. The longer an accelerant is exposed
to heat (i.e. the origin), the more differentiated its fluorescence colour
will be from other less exposed areas. Evidence of accelerants gets
absorbed in a fire and is therefore almost always invisible to the naked
eye. The area tarnished by accelerants however is easily discernible
under UV light.
Hydrocarbons
Volatile hydrocarbons such as gasoline, kerosene and other petroleum
fractions such as benzene, acetone, grease, lard, vegetable oils, paints,
etc. fluoresce when exposed to UV light. By using UV light,
investigators can accurately identify locations where samples should
be collected for further laboratory analysis. UV light can also be helpful
in locating fragments of incendiary devices since explosive wrappings
are frequently fluorescent. Samples collected in cans and plastic
evidence bags can be heated in warm water to form condensation.
The latent accelerant residue rises to the surface and this can be seen
under UV light.
Pour patterns
UV light has been used to identify pour patterns, the shape of an
accelerant container and pour trails leading back to containers. UV
light will indicate accelerant long after its odour is discernible. Masking
an accelerant will not prevent its UV detection. Accelerant on skin or
clothing will fluoresce as well.
Advantages of UV light compared to canine or mechanical
‘sniffers’
• Use of UV light is not affected by wind conditions.
• The ‘sniffer’ indicates a general area of saturation yet does not detect
specific infected areas. This makes pour pattern sampling difficult. UV
light detects specific areas.
• The ‘sniffer’ is effective only two to three days after saturation. UV
lamps have been proven to effectively fluoresce samples up to two
months after an incident.
• After a lengthy hot fire, the odours of accelerants have usually
disappeared.
Environmental Investigations
Illegal Dumping
UV light can assist in environmental investigations by indicating the
presence of hydrocarbons on land and in water. Illegal dumping has
been traced using this technique. Trace dyes can be used along with
UV light, and some radioactive substances fluoresce as well
Invisible Inks
Property Marking as a Crime Countermeasure
Police routinely use UV light to detect, identify and return stolen
property that has been marked with fluorescent ink. By using a UV
fluorescent marking pen, valuables can be discretely marked with
important details such as a name, initials, phone number, case
number, date or other information. Police also mark weapons, plastic
baggies of narcotics or electronics used in sting operations using this
method. Such ink is invisible to the naked eye and is only revealed
when illuminated with UV light . In case of burglary, the owner of a
recovered, stolen item which has been marked in this way can be
traced simply by using an ultraviolet lamp. Other inks work in a near
opposite way by absorbing ultraviolet light. When they are used on
fluorescent paper, the written-on areas fluoresce less than the
surrounding paper areas when under an ultraviolet lamp. Invisible ink
pens can be used on most glass, plastic, wood, paper, cloth, and metal
surfaces. By illuminating the marked surface with UV light, the marks
become clearly visible to police, detectives and pawn shop owners.
Also used for the detection of DNA Based Tracer Liquids and
SmartWaterTM.
Narcotics
COCAINE | AMPHETAMINE | ECSTASY
Some narcotics such as amphetamine, cocaine and certain MDMA
tablets are clearly fluorescent when illuminated with UV light. Even
minute amounts of certain narcotics can be readily visible when
illuminated with UV, making the investigators work much easier when,
for example, performing a house search for suspected narcotics.
Powder and powder residue which remains on clothing, hands, tables,
kitchen sinks, balances and other tools, and which is not normally
visible in normal light, becomes highly visible with the use of
ultraviolet light.
Fluorescent narcotics
• Cocaine
• Amphetamine
• MDMA tablets (including some but not all Ecstasy tablets)
Cocaine
Cocaine having a purity of at least 87% fluoresces clearly when
illuminated with UV light.
Amphetamine
Some amphetamine having a purity of 78% (i.e. of Dutch, Baltic or
Polish origin) are clearly fluorescent when illuminated with UV light.
Even small amounts of amphetamine are easy detectable because of
their fluorescent nature.
MDMA tablets
Some MDMA tablets (i.e. Ecstasy with four-leaf clover logotypes) are
clearly fluorescent with UV. Even small fragments are easily visible as
they fluoresce intensively
Invisible Marker on Fabric
Invisible Marker on Electronics
Interception of Secret Messages
Successful use of invisible ink depends on not arousing suspicion. Tell
tale signs of invisible ink, such as scratches from a sharp pen,
roughness or changed reflectivity of the paper can be obvious to a
careful observer who simply makes use of strong light, a magnifying
glass and their nose. Also, key words in the visible letter, such as 'red
cabbage' or 'heat', in an odd context may alert a censor to the use of
invisible ink. By using ultraviolet light, messages can be quickly
screened for invisible ink and also read without first permanently
developing the invisible ink. Thus, if a censor uses this method to
intercept messages, he may then let the letter be sent to the intended
recipient who will be unaware that the secret message has already
been intercepted by a third party. A "screening station" could
theoretically involve visual and olfactory inspection, an examination
under ultraviolet light and then the heating of all objects in an oven
before finally trying exposure to iodine fumes.
Forensic Lights - ALS
The Labino MB Aris is an extremely portable and robust
hand-held ALS Lamp based on the very popular MB Series
of UV LED Lights.
Ideal for Forensic Investigation and Crime scene
applications.