NASHVILLE, Tenn. — An associate said Wednesday that the wife of ex-NFL quarterback Steve McNair didn’t know about Sahel Kazemi before the 20-year-old woman was found dead alongside her husband on the Fourth of July.

McNair, 36, was shot four times in what the medical examiner has said is likely a murder-suicide, though police haven’t confirmed that Kazemi was responsible.

Mike Mu, who has worked with McNair’s charitable foundation for years, said Mechelle McNair ‘‘didn’t know who this girl is.’’

Mechelle McNair, who has not spoken publicly since the shooting, has been described by people close to her as being very upset and distraught. Agent Bus Cook said McNair’s wife was ‘‘in and out’’ of it in the hours after the shooting.

Kazemi’s family told reporters that the woman was so confident McNair was divorcing his wife of 12 years that she was preparing to sell her furniture and move in with the former quarterback.

Mu is handling media inquiries for Thursday night’s memorial service in Nashville. A funeral service will be held Saturday in Mississippi.

The close friend who reported McNair’s death to 911 defended his friend since their days playing football at Alcorn State to The Tennessean. Robert Gaddy said the the McNairs’ Nashville home was on the market because they were looking for a new house.