[aruanan]

Just curious. Where and how would the police have obtained OJ’s blood to plant it? It sounds like more than trace amounts.

OJ gave blood samples. At least a couple of tubes were taken. They were carried from where the blood was drawn back to OJ's place by the LA detective who was supposed to have transferred them immediately to a technician, but continued to carry them around with him in his pocket.

[CommerceComet]

When did he give those blood samples? Was it from an earlier incident? The police would have no reason to ask for a blood sample unless there was blood that needed to be compared. There seems to be a timing issue here.