Cops having trouble in PopSmokes murder case

According to TMZ , investigators been having some issues in PopSmokes murder case. It is said that the witnesses they have come across are either not wanting to speak or switching stories that are untrue. There were no actual people outside of the residence when it occurred. Cops spent more time tracking people down because he resided in NY. As well as trying to find videos online that claim to be connected but are just unrelated cases. Investigators are searching for a break and still have no motive as to why he was targeted.