Police found Resper, 18, suffering from a gunshot wound to his chest and a head injury in the 200 block of Adams Street Northeast.
According to court documents, police believe that McGainey chased Resper after he witnessed Resper and two unidentified males stab and assault his friend in the 400 block of Rhode Island Avenue Northweast.
That friend told police that he was with McGainey at the time he was stabbed, documents say. McGainey initially denied shooting Resper.
Seventeen days after the murder, police responded to a hit and run and found McGainey and his brother. When police arrested McGainey, they found a Colt .38 Special revolver behind the passenger seat and five rounds of ammunition, documents say. An MPD firearm examination found that one of the rounds matched the bullet found recovered from Resper’s body.
McGainey, who is being charged as an adult, is scheduled to appear before Judge Jennifer Anderson for a felony status conference on January 23 at 11:00 a.m.