CONCLUSION: C
The individual who executed Fannin is person C. The verification is that he dined with his left hand and shot the gun with his left hand as well. This is evident as the right handprint on the wall denotes that he must have fired the shot from his left hand. Also, the silverware beside person C’s plate was placed on the left side, indicating his left hand dominance. After he murdered Fannin, he sauntered away, leaving the footprints of x. Also, person B, C, and D knew each other, as their checks all equal $8.75. Person Y is Ernie, because he cashed in the $8.75 into the cash register and after he heard the gun shot, scurried into the kitchen.
To culminate, the silverware on the left side of person C’s plate and his right handprint on the wall implies that he is the assassin. Also, person B knew person C and D, as they cashed their checks together and sat beside each other. Lastly, person Y is Ernie, who cashed the $8.75. Therefore, person C is the murderer.