Any law enforcement/police officers here?
 

I'm not going to get into the details, as there is an investigation going on right now, but I was threatened to be killed at work today by an irate customer who left before the cops got there. The officer took the security tapes, and my statement. What exactly are the chances of him being caught? I don't like looking over my shoulders all the time.

It's tough to say without knowing more. The threat has to be deemed credible for the guy to be charged - otherwise the whole country would be in jail now. So, if he has a criminal background or history of such threats he may be charged, or if he displayed an extremely agressive posture towadrs you, otherwise prolly not.