How reliable is a cigarette butt for DNA evidence?

It is a really good source of saliva, so as long as the smoker isn't sharing his/her cigarette it will almost always give a good DNA profile. read more

Extracts from the ends of ten unsmoked Marlboro cigarettes were obtained using the same procedure used to extract DNA from the smoked cigarette butts. 2.5. DNA typingDNA typing for D1S80, HLADQA1, TH01 and PM was performed in each sample. read more

Gathering DNA Evidence; Identifying DNA Evidence; Crime Scene Integrity; Contamination; Chain-of-Custody; Transportation and Storage of DNA Evidence; Gathering DNA Evidence. Physical evidence is any tangible object that can connect an offender to a crime scene. Biological evidence, which contains DNA, is a type of physical evidence. read more