Gun control & safety

Well I'm  very depressed with what happen in Newtown,Connecticut because why would he kill 28 people for no reason.I wonder what made this guy kill all those  nice& greatful kids for no reason, also what made Adam Lanza want to kill his mom, all those teachers ,& little kids that went to newton. many people in the U.S want the guy rules to tighten up a lot because of the many shootings in the other states as well. i personally think that they should tighten up on gun because people/ kids are getting killed for no reason & also because it makes no sense to me that people buy guns in the uses them in a dumb act of violence such as a robby,drive by & etc.