The corpse in in the trunk of the car. The murderer is in the room on the left, pretending to know nothing. The guy next to the car will see something suspicious and find the body soon. The mechanic having a beer at the table’s wrench is covered with his fingerprint, so he will be prime suspect, especially because the victim is his mother in law. His father, also at the table, will also blame him, but he in fact staged this whole crime because the squirrel slept with his wife.