1, cigarette filters can't be smooth, and about five have been smoked; Smoking has been dry for the last three days, and there is no ash attached.
Pay attention to washing your hands when picking up cigarette butts. Don't touch cigarette butts directly. It is best to put it in a clean envelope with clean tweezers or toilet paper.
3. Mark the envelope.
4, cigarette butts belong to special samples, there is the possibility of identification. Smoking head can be paternity tested. In addition, you can also use chewing gum for paternity test. And a toothbrush can be used as an identification sample. If you have any questions, please consult Chifeng Yuetai DNA Judicial Appraisal Center, Room 7 12 17, Business Incubation Base, Area C, wanda plaza, Chifeng. Tel: 0476-8785299.