Adam Montgomery murder trial video: Retired criminologist testifies about testing for blood samples

Kevin McMahon, a retired criminologist for the NH State Police Forensic Lab, testified he tested several items for blood connected to this case.
WARNING: Some descriptions used during the trial might be disturbing for some viewers. Explicit language might also be heard. Viewer discretion is advised.
Subscribe to WMUR on UA-cam now for more: bit.ly/1lOjX9C
Get more Manchester news: www.wmur.com
Like us: / wmur9
Follow us: / wmur9
Instagram: / wmur9