You can actually prove if they do do it.
By looking what they look like, what they dress up, and face poseurs.

Any murder charge given in the UK means the accused if found guilty will be given a life sentence. A life sentence doesn't usually mean life though. 15 years is the minimum for a life sentence and the accused is given a parole hearing. Depending on whether the jury believes that the prisoner is considered a danger to society or not.

In some cases however the accused can be given a higher life sentence eg. Ian Huntley, who got a minimum sentence of 40 years.

If you can tell me one hacker who has had a life sentence then please show me a source.

My Source:
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