F or a private detective working in Los Angeles, most investigations tend to follow a predictable pattern. You get a divorce case, or a custody case, and from the time the client pays the retainer, you know what the job will entail. You’ll follow a guy around taking pictures from hotel parking lots, or outside of a club on Sunset, trying to prove he’s having an affair. Or maybe it’s a workers’ comp case. Same thing: You tail a guy, take pictures, prove he’s not really hurt. But the Adam Iza case, it was different from the start. Iza was...