Police are yet to determine if this was in fact a murder suicide. The gun that was used was a firearm purchased by McNair's girlfriend, Sahel Kazemi, from an unnamed private seller.
Investigators have yet to identify or name the private seller. Sahel Kazemi was not yet of legal age to buy a firearm from a licensed gun store, and if she did, she would have failed the background check that would be required to purchase guns.
Current gun background check loopholes, like purchasing from private sellers, have not really been given much attention. Had background check and gun control laws been strictly implemented, the waiting time and background check on Kazemi could have prevented the alleged murder suicide.
McNair is married and his death leaves his four children fatherless. Police and detective have yet to provide solid evidence to determine that the shooting was a murder homicide brought about by a lover's quarrel gone wrong or perpetrated by a third party assailant.
One thing is clearly determinable, McNair's death was a homicide, but the death of his Kazemi is yet to be determined. Uncovering the truth will follow after thorough investigation, autopsies and ballistic tests.