Nashville police investigating the murder of former NFL quarterback Steve McNair now think the gun used to slay him belonged to Sahel Kazemi.
That would be the 20-year-old woman McNair was having an affair with.
McNair was found shot four times - twice in the head and twice in the body - in a fatal, mysterious incident at a Nashville condo early Saturday.
Sahel Kazemi suffered a single, fatal gunshot to the head.
Don Aaron, a Nashville police spokesman said this afternoon, "We believe the pistol recovered from the apartment was purchased by Kazemi."
Cops were told Kazemi and McNair "had been in a dating relationship," even though McNair was married to his wife Mechelle and has four kids.
The gun in question was found underneath Kazemi's body - the police think murder-suicide is a possibility, but have yet to say anything official.
While her death was the first time some people close to McNair even heard of Sahel Kazemi, she told her family she wanted to marry McNair.
The deaths of Steve McNair and Sahel Kazemi, 20, exposed their affair. McNair, 36, made three Pro Bowls and led Tennessee to Super Bowl XXXIV. [Photo: TMZ.com]