The speaker explains the process of DNA testing and swabbing for blood evidence in a cold case. They go into detail about their findings and the contributors to the blood found in the case.
DNA found in the house and car of a possible suspect, Glenn Butcher, has an 83% match for Christine Lundy's DNA and an 88% match for Amber-Lee Cruickshank's, indicating the possibility of their murder.
Police send DNA and fingerprint samples to the FBI's database even years after a case being unsolved, leading to the possibility of linking suspects to crimes. The never give up attitude of law enforcement has been boosted since the improvement of the FBI's database system in 1999.
The discussion highlights how a public speech by a lawyer was seen as a direct attempt to influence potential jurors, thereby violating the pretrial publicity rule in a criminal case. The violation led to the postponement of the trial and the lawyer being removed from the case.
The defense in the Mark Twitchell case claimed that the blood on Twitchell's clothes was from an animal and not from human murder. However, the knife found in the kitchen had only animal fat on it and some sort of soap, leading to further questioning.