Punishments
Science and Crime detection
Modern detective use a wide range of scientific techniques to help them identify and catch criminals.
Fingerprinting
Fingerprints have been used for more than 100 years to prove whether someone was at a crime scene or held a weapon. Experts dust areas for hidden prints, which can also revealed under special lights or on contact with certain chemicals. faint prints can be improved by laser image enhancement.
DNA testing
Now forensic use DNA testing or genetic fingerprinting to prove or disprove a suspect's connection with a crime, everyone DNA is unique and even the smallest samples -a single hair or a trace of saliva - can provide evidence.
Psychological profiling
Experts prepare profiles that suggest certain features of the killer, based on the nature of their murders. The profile may give likely age, background and habit. This builds a portrait of the criminal and helps detectives track him or her down.
