Answer: Jason McCubbins, Ray's business partner. The calendar is the clue to solving this murder. The police realized that since Mr. Whitcombe was wearing his watch on his right arm, he must be left-handed. But the pen was found in his right hand. Realizing that the number on the calendar was written in a hurry and with his opposite hand, the police matched the written number with the months of the year. So the B was an 8, thereby giving us 7-8-9-10-11: July, August, September, October, and November. Use the first letter of each month and it spells J-A-S-O-N
Answer: The man must first place a coin in the center of the table. He then must replicate every move the serial killer makes on the opposite side of the table. Eventually the serial killer will run out of places to place a coin and the man will win.