Making me ill to type this out, but I do not think we know how the semen got on the cloth, it may have not come in contact with AR at all. I thought the reference earlier to the semen being on her back wasnt when it was collected, I thought she said she would get it later? I could of misunderstood the time frame it was collected.
You are correct, as was the other poster, thank you! He asked for the sample on June 23rd, told her to collect it from her stomach. The encounter with it on her back was from May 28th, she hadn't been asked to get a sample yet. DNA consistent with Brooke was also on the handerchief, which I believe is the blood.
From the last document on Adnoid's link:
http://www.websleuths.com/adnoid/bennett/