Bill has a special power: he can create any kind of sensory hallucination on anyone that gets near him (about 1 km range).
The hallucination can be as complex as he wants it to be, and it doesn't require him to pay attention to its victim (it can be a completely passive effect, like making everyone see an empty bed instead of him sleeping).
Assuming no sniping (he lives in a city so there is no way to get a clear sight on him without entering his powers range) and no carpet bombing, what would be the best way to kill (or at least capture) him?
This is fairly similar to Assassinate a semi-omniscient crime lord, but there are a few key differences:
- He's not omniscent. He doesn't know how many people are in his powers range, or what they are doing
- He can only act directly on those that he knows are there. If he doesn't know someone is near him, only his passive powers work
- He doesn't have huge financial capabilities, though he could trick cops to protect him with some complex hallucination
- As soon as he notices someone, he can make him visualize/hear/percieve whatever he wants
EDIT: everyone is assuming he's a villain, but he's not. He just wants to live a normal life, but is chased down by the government/special forces, and has to resort to self-defense tricks like making himself invisible to everyone but those he's talking to.