Sid was a drug dealer in Zane Morgan's crew. He was among the latter's men who approached Dylan in the warehouse. Zane said they were going to do a job for them, which caused Dylan and Remo to be concerned.
Zane and his men made some kind of plan while Dylan eavesdropped. The latter and Remo later met Zane and the men who revealed that they were going to storm Nick Ford's warehouse. He was among the men later killed by Alex Romero.