I think what's always been interesting to me than the science and the criminality with this job is what happens to your persona, your disposition, after day in and day out dealing with life and death.
There's only one interview technique that matters... Do your homework so you can listen to the answers and react to them and ask follow-ups. Do your homework, prepare.
There are two great days in a person's life - the day we are born and the day we discover why.

