and on christmas eve 2004, christopher hampton writes a curious letter to law enforcement. >> mr hamptond found that somebody had come into my apartment and poured beer on my floor, smeared mayo, ketchup, hot sauce, flour, and all kinds of other stuff all over my bedroom floor." >> and in this letter, he talked about he had rented a carpet cleaner. and instantly, i mean, i knew. why is this guy telling us he rented a carpet cleaner? he's telling us this because he thinks we know something that we don't know. >> he goes on to say, "i saw tamika last the day before i rented the cleaner." >> we felt that was very unusual for someone to write a letter to law enforcement about unusual damage in their apartment and renting a steam cleaner right after the last time they saw someone missing. >> i remember steve bringing me the letter. and my thought is, we have a missing young woman that you are connected with, and you want us to believe it's ketchup? keep talking. keep writing. >> that letter raises suspicions about what might've happened in hampton's old fremont apartment. so detectives check