Not so sure about self taught - can you get the equipment - I think here in the Uk there are laws about the sale of bows, might be worth checking what the situation is in Portugal.
I think some are drawn ti the violence of video games - they will go on to commit act of violence or murder. maybe chicken or egg here - what came first the game or the violent instinct.
I'm confused - KIM was not tried - sentenced or jailed - as yet. The 50 years mentioned in the photo was the maximum sentence given much media hype - he may have been sentenced to.
However I can agree with your point the media may play such a role - as you suggest. In fact I do believe your...
I liked "The Suspicions of Mr. Whicher: or the Murder at Road Hill House"
I enjoyed the factual historical detail - the book is also well annoted with extra details - extremely well researched and written. A good read even if you do not consult the extensive extra detail.
Paperback: 400 pages...
I just had a look for some more info re threatened species a good article here. so sad -
http://www.guardian.co.uk/environment/2012/sep/11/100-most-endangered-species-planet