Optimistic Investigation of William's Whereabouts

Where should the detectives search for clues?

1) William's old job

2) William's old club

3) William's old gym

Answer: They should investigate at William's old gym.

After the last conversation with Mrs. Morningstar, the detectives are left with a lead on where to search for clues to find William. By focusing their investigation on William's old gym, they might uncover valuable information that could lead them closer to locating William.