So what happened is when melly was 15 his 10 yo Friend did a home invasion prank on him and melly shot him thinking it was a Real robber and this song and murder on my mind is basically ynw melly saying that it still haunts him. Hope this helped
Also if you think about it when he said never knew a home invasion would have cost me my life he’s talking about both of them it cost the boys life he shot and it cost him his life in jail