I need some help? In the movie "Boyz N The Hood" What is the actors na!

I need some help? In the movie "Boyz N The Hood" What is the actors name whom kills Ricky?

He has a hat on a lot, he has light skin, a rather unique nose. After Tre gets one of the neighbors children out of the street, a red car pulls up to him (the car with the people that are out to get tre and doughboy and the rest of the click) and " " in the back points the shot gun at him and smirks, they drive away saying "mark" (meaning? merk i think) also if you know the song they are playing on the stereo in that scene would help as well. All it is is the beat only no words, it would help me out allot to find this information out, and please don't talk sh*t about my question being pointless, its just a couple things i would like to know, i can ask wahtever i want this is yahoo answers isint it?

1) Lloyd Avery II. He's dead now.

http://www.imdb.com/name/nm0042998/...

2) "mark" is a west coast term meaning "someones whose not gangster or tough or who they think of as a loser because they aren't up to the standerds of the so-called gangbangers."

3) song played when Ricky's shooters first stick a shotgun out of the window and point it at Tre while he crosses the street?

A: "A Bird in the Hand" by Ice Cube

4) You need to be nicer.