Player Actions and Consequences, ...or, when characters do stupid things Options

[Faenor]

hello everyone. longtime reader, first time poster

I've been GMing a third ed shadowrun game for approx. 6 months now, and most of the characters are fairly dynamic; we have an Irish mage who uses her magic for forensic work; she used to do forensics for the Star. We have a private investigator with a contact for every situation who left the force to due him being scape goated for a scandal. We also have a japanese phys ad who attempts spiritual and martial perfection through conflict and peace (it's a long story).

And certainly, we of course have the cold-blooded Magician's Way adept who's idea of negotiation is sticking a gun barrel down someone's throat by the name of Dante (from Devil May Cry: the video game).

Essentially, Dante's player screwed up royally. while trying to find someone in a ten story walk up, he was ambushed by a gang to off him. He then proceeds to tell me that he unslings his MGL-12 grenade launcher and start putting rounds down the hallway. after a heated exchange, three of the five gangers are dead, and he's at one point away from a deadly wound. His Doc Wagon bracelet goes off, and he's picked up. Next thing he knows, he's under arrest on federal weapons charges with intent to kill. Multiple weapons charges. Because he has several assault rifles at home, along with several LAW rockets and security armor. I essentially said that he had to make a new character because his current character would be spending the next fifty years in a prison cell hooked up to a simsense rig through his brand new shiny datajack.

My question is: Was I too harsh on this player? If you had the same scenario, how would you have handled it? Or would you let the other characters make a run to try and bust him out (which I doubt they would do, the rest of the group was excited to get a level one weapon focus which they gave to the phys ad because he can attack spirits more effectively)

Thoughts? Ideas? Munitions?