knob on a door that led from the main house in to the backyard garage. the blood became evidence item 805, collected days after carol s death. and who s dna was mixed with carol s blood? jim knapp s dna. just like the thumb print the question becomes when did jim knapp s dna get put on the door handle. robertson had his suspicions and steve s sister sharon did too. you felt that jim knapp should have been investigated. he should have been investigated there were a lot of red flags that were concerned. jim knapp said he was nowhere near carol s house, he