The fifth day of the Carly Gregg murder trial saw the testimony of several witnesses. The prosecution called a forensic expert who testified about the presence of the defendant’s DNA on a knife found at the crime scene. The defense argued that the DNA could have been transferred during a consensual sexual encounter. The victim’s roommate testified about seeing the defendant and the victim arguing the night before the murder. Another witness, a neighbor, testified about hearing loud noises coming from the victim’s apartment around the time of the murder.