I live in Whittier Ca and have never seen a spider like this I have had it in a container for three days now and just fed it another spider. I have enclosed a few photos. It is red with a blackish-gray bottom it has fangs and is as a quarter when it’s legs are stretched out. what type of spider is this?
You should release this harmless Sowbug Killer back into the garden where it will do what its name implies, kill and eat Sowbugs.