Should I draw the line?

The story goes like this:
A friend went through a nasty breakup some time ago. She, along with her now ex-boyfriend also happen to be fellow students of mine and we all ended up in the same group for a long-running software project (which is still in its infant stages). There were initial worries regarding this combination, but for a while it worked out very well.

Until a few days ago, when the guy had a bad day, too much to drink, both or Idontknowwhat. He assaulted the girl's new b/f in a club, made grave insults and threats directed at both of them and went on to terrorize them for hours through an apartment door which he eventually damaged with a brick. I'm still surprised the cops only took his name, address and such.

While I'm glad that nobody was seriously harmed that night, there is still trouble ahead regarding aforementioned software project, as one person certainly has to leave after this episode. The brick-guy has been somewhat of a driving force so far and is arguably more skilled in coding than my friend. So from a purely productive standpoint it would probably make sense to ask her to leave. I greatly dislike this option, since at this point, switching to another group could be difficult, so it would be like punishing her for a mess someone else has caused. Not to mention I loathe the thought of closely working with that psycho for over half a year.

As you can see, it's a bit of a dilemma. So, what would your advise for me be, regarding what position I should ultimately take and how I could approach the others with it (including some who don't know anything about these specific circumstances)?

And of course, similar experiences and how they turned out are very welcome as well.

How ya doing, buddy?

Originally Posted by Unas

have you considered the angle that if you kick her out it could have a horribly negative effect on your friendship too?

Well, she's actually made remarks along the lines of "well, he's more skilled than me anyway and if he has to leave, he'll take it out on me again...". Sounds great huh?

So before too much time goes by and that line of thought gets the better of her, I've made arrangements for a group meeting next week, with everyone present but brick-guy. There I will suggest exactly what pretty much everyone has suggested: He fucked it up, he'll deal with the consequences.

Thx for your advise so far, I'll keep you guys posted.

There's nowhere I can't reach.