Nashville's assistant medical examiner says gunpowder residue was found on the hands of Sahel Kazemi, the mistress of Steve McNair  who was found dead alongside the slain former NFL star, according to the Associated Press.

Feng Li, the assistant medical examiner who conducted the autopsies, said  he will wait for the police investigation to close before he completes Kazemi's death certificate to reflect that she died of suicide.

However, Li did say the test results make it even more likely that 20-year-old Sahel Kazemi shot McNair and herself, but he did not confirm or deny that it was a murder-suicide.

With the lab tests to be obtained combined with the autopsy findings, we will put a final opinion on the death certificate, Li told The Tennessean.

McNair was shot twice in the head and twice in the chest, while the 20-year-old Kazemi died from a single gunshot to the head.

A gun was found under her body which she had purchased less than two days before the killings.

The gun that killed Kazemi was in contact with her head when it discharged, medical examiner Bruce Levy said Tuesday.