I have never used, nor have I heard a person of my acquaintance or otherwise use the term "Homie." I don't even know what it means.
I am basing my opinion, and it is only my opinion, on what Rachel his friend said she heard. She said that TM told her he had reached the condo where he was staying, in the back of it. She said that TM said he (The man following him) was back. She heard TM say something to the effect of "Why are you following me?" She said that another person, presumable GZ, said "Why are you here?" That means to me, at least, that TM did attempt to return to his father's fiancee's condo and made it to the back yard when he was accosted by GZ. I do not know how they ended up where they did when the shot was fired. I believe, again only IMO, that GZ somehow forced TM to return in the direction of his vehicle to detain him until the police came when TM resisted part way on and GZ shot him. I do not believe TM would have been able to speak once shot in the heart. Furthermore, since TM's hands were under his body, GZ could not have pulled them straight out. I believe GZ is guilty of murder. IMO
Homey, homes, home slice, etc. are pretty common today in my experience. They've made a comeback recently maybe -- kinda retro. They were very common when I was growing up, too.