SVU

I just watched an episode of svu about a mother and daughter who were brutally murdered. They really didn't have any clues except their were teeth marks on the bodies and they found out the mother was having an affair. They went to see him at his tennis club and he wouldn't talk until the detectives embarassed him and he finally talked. He told them that the girls were last seen with a homeless guy in the park. When they go to see him and go to where he sleeps and see all the newspaper clippings he has about rapings and murders they then bring him in for questioning. After interigating him they realize that he suffers fro alzimers disease and they don't have any evidence on him anyway. Then they found out that this Banks guy was the last one to see them and they brought him in for questioning. While questioning him the detective offers him a piece of gum. It was trick to get his teeth marks so they could match the teeth marks to the ones on the body. They ended up matching the teeth marks and bringing Banks to court. The judge dismissed the case saying that teeth marks were not enough evidence. But they ended up linking Banks to the Murders because of where he was at certain times.