One witness testified during the third day of a murder trial at the DC Superior Court.
The prosecution admitted the alleged murder weapon into evidence.
Matthews plans to have an expert witnesses testify regarding the DNA.
During the Oct. 28 proceedings, a Metropolitan Police Department (MPD) officer who responded to the scene testified that his partner saw White take her last breath and they both thought she was dead prior to being transported to the hospital.
According to court documents, White was pronounced dead at approximately 5:28 p.m.