This theory is speculation at this point...
But read the whole thing.
Legal Insurrection: More like Jared Loughner...
The Blaze: Was mental illness the reason for the attack?
The Hill: Shooter prescribed medication known to trigger agression?
Daily Mail: Shooter was methodical but also suffered allergic reactions to chemicals...
Wombat: American Thinker: The Time Factor And Active Shooter Incidents, This Ain’t Hell: I Used To Think Gun Control Was The Answer – My Research Told Me Otherwise
Mark Steyn: Theory of the Case: Mark is right, what was the shooter trying to accomplish, its seems very coldly calculating of achieving a political result, The Empty Paddock and Continued
Powerline: Speaking of Las Vegas
Hogewash: Speaking about Las Vegas
NBC News: Girlfriend claims Paddock screamed in his sleep?
Hot Air: About that repeated ISIS connection (it's probably a lie, but it's weird)
Las Vegas Review: Explosives found in Las Vegas have possible connection to NYC bombing? If true connection (not just coincidence), wow...
Instapundit: FBI Agent: Pursuing multiple leads around the world? That does not suggest psychotic drug interaction. Was the shooting politically motivated? At this point we just don't know.