Why is that? Evidence was found within feet of the victim. Investigators spent 10 days processing the scene, They missed crucial evidence ... like avulsed teeth under the bed. Did they forget to look under the bed ... perhaps investigators had their suspect in mind and a tooth or two under the bed didn't matter much in the scheme of missing video footage and other missing alleles. Given that police describe this as a prolonged struggle, it's surprising that investigators weren't looking for evidence of a suspect ... even if it's nothing more than a tooth fragment under the bed.
It's classic tunnel vision. The cops knew that tooth didn't belong to Jason because they examined him a few days after the murder as part of the NTO. But there really is no excuse for their failure to collect the tooth and test it. The autopsy was completed. The ME didn't note any teeth were missing and not recovered.
JMO