I want to make my friend pay $8000 for kicking our housemates door down, but he won't pay up.
That's a steep bill. How are you involved in this incident?
He told said he would pay for it and now he refuses to do so.
If he did break the door down then yes he should pay for it. If he refuses then your housemate should press charges.
I am pissed that we got evicted after this.
I can see how this situation would upset you, especially if it caused you to get evicted. It's wrong for him to leave you guys stuck with the bill. Maybe you should consider taking him to court.