the way you present these theories you’d think it was a 33/33/33 split between them.I completely agree. No way was it planted. Logically, the ways his DNA could have gotten on the sheath is
1. IF he came in contact with the sheath sometime and somewhere before the murders (not during the murders as there are apparently no other samples of his DNA at the scene, so it likely wouldn't have happened at 1122 King Rd - it would have had to happen before he put on the gloves he must have worn to prevent other touch DNA in the house, IF he is guilty.)
2. OR, if he is innocent, the real murderer came in contact with BK at some point and unknowingly transferred BK's DNA to the sheath at some point or even unknowingly came into contact with BK's DNA on some object such as exercise equipment or a table or something and then handled the sheath unknowingly transferring BK's DNA to the sheath.
3. OR, the ONLY other possibility I can think of is a DNA lab mistake as described by Dr. Leah Larkin. So I really feel this line of inquiry needs to be explored. I don't want it to turn into a cause for appeal if he is tried and found guilty because appeals are expensive. I'd rather this entire question be explored now BEFORE trial to put it to rest once and for all.
Anyone have any other ideas of how his DNA got on the sheath outside of these ideas?
All JMO.
But they are far from equal
When all other publicly known evidence is considered scenarios 2 and 3 start sounding silly and it’s more like 98/1/1.
Giving those a 1 is being generous.