their lives and passionate about each other. but one day, a terrible house fire left one of them dead and the other facing questions from investigators. here again is keith morrison. >> reporter: while the deadly fire was burning at his home on addison avenue, paul was at his hooka lounge just a few minutes away. he rushed over but could only pace back and forth as firefighters did their job. soon after that, he sat down with the palo alto police to help sort out what happened, though, as you can see on the video recording, sat is probably not the best description. paul was full of nervous energy and frantic questions. at this point, nobody had told him that jennifer was in that fire. >> i'm worried about my house, what about my girlfriend, what caused the fire and i don't care about this. i just want to know about jennifer right now. >> i'm not sure i know anything more than you do.