We found this bug in a bedroom in southern California. It's small: the body is about 5mm and the length including legs and antenna could be up to about 10mm. It's mostly black, though the abdomen from the bottom appears to have gold highlights under light when I used a flashlight. In sunlight it appears somewhat brownish. It looks like it has wings which forms sort of an "X" pattern on its back. The legs are dark black or brown but may be somewhat translucent in sunlight to appear an orange-gold color.
What species is it? It looks to me a little like a plant bug (phylinae?) or roach or beetle but I'm not sure. And could this species bite?