Murder on Montezuma

Two men in masks walked into the Prescott bolthole of a Vegas mafia boss, Tommy Bonetti, and gunshots rang out. After the shooting stopped, eyewitnesses saw one of the two men flee the scene. Nobody else exited the building; police arrived to find everyone in the room had been killed, including the second shooter. However, nobody knows which dead body was the second shooter, and who was the person that fled the scene? Your Task: Identify who both shooters were, the one who fled the scene and the one among the other bodies in the room. Look for clues to unlock and examine the evidence to narrow down your list of suspects and solve the crime.