but how much will he have to spend defending himself from civil suits.
Not a penny. Few attorneys in Harris County will even consider taking that kind of case.
Before any sleazy attorney will take the case for the bad guy's family, they'll ask for a $20K up-front retainer, 'cause they know they're gonna lose. They have to make their money from the client, not the homeowner.
Recalling my son's shooting, the bad guy's mama-cita couldn't find an attorney to take the case on contingency. She even had help from a foreign consulate and still couldn't find one.