Steve McEwan logs on to computer chat rooms and tells people he’s a teenager. Then he waits for the sex talk and cyberporn to find him. The San Jose detective assigned to the child exploitation detail spends countless hours chitchatting with complete strangers and monitoring the stream of sexually explicit conversation that flows steadily into his mailbox.

And when he feels he has enough evidence, McEwan arrests the senders at the other end for violating a state law designed to protect minors from lewd material on the Internet.