The married former Tennessee Titans and Baltimore Ravens quarterback, 36, was discovered on 4 July (09) in a downtown Nashville condominium with shots to his head and chest. The body of his girlfriend, Sahel Kazemi, was found nearby, with just one gunshot.
Tennessee police announced McNair was killed by Kazemi - who they believe fired a semi-automatic weapon, recovered from beside her own body, before turning the gun on herself.
His family was left devastated by the tragedy, and his widow Mechelle has been appointed administrator of his estate in a bid to sort out his affairs.
She named her two sons, Tyler and Trenton, as heirs - but failed to mention McNair's two sons from a prior relationship, Steven McNair Jr. and Steven O'Brian Koran McNair, as heirs.
According to Tennessee law, Mechelle will get a third of the estate and the remaining two-thirds will be split evenly among the named heirs - meaning two of McNair's sons will receive none of their father's assets.