Howlett says that's when Smith and the other man decided to rob Davis.
The 20-year-old victim was shot in the head and arm. His mother found his body in his Chicago apartment on April 24.
Howlett says while plotting the robbery, Smith decided against participating because he'd victimized Davis before. But Howlett says Smith's friend and another man robbed and killed Davis, splitting the proceeds with Smith.
Smith was ordered held on $1 million bail. The others haven't been charged.