You can find the information about his father on his personal website: www.harrywelchjr.com
Here's a screenshot taken from the shooter's CouchSurfing profile: http://i.imgur.com/lfvtNsi.png
How much more can we find out about this clusterfuck of an investigation and keep putting it down to coincidence?
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Sciency ago
I suspect the former. No shots were fired, and context sugests that the man was more than capiable of operating his weapon.
The other possibility is that it was meant to paint us researchers as unstable gun-brandishing thugs.