FBI Investigation

The Gambini crime family hosted their usual Friday night poker game yesterday, but this time, it turned deadly. The conversation around the table quickly turned to suspicion – one player was accused of being a card cheat, and another was accused of being a snitch. Violence erupted, the cheat got murdered, and the suspects quickly fled the scene. However, the snitch came back to leave clues as to who committed the crime.
After sweeping the crime scene, the police have called you, the head officer from the Special Investigations Unit to investigate. They reset the room exactly as the snitch had left it (after removing the body) and hope that you can use the clues to identify the killer and find the murder weapon.