It's called "motile sperm." Sperm stays alive only a certain number of hours.
There was none of KB's sperm in the accused, as the accused herself admits.
And, since her pre-Kobe sex would not have yielded motile sperm, one is forced to conclude that she had sex after her encounter with Bryant.
I read on the Court TV website that Mackey has asked for DNA samples from two men: Brian Pietrack, the star witness, and a guy named Herr.
She knows that one of these will be a match to the motile sperm.
Oh, and the Court TV website also says that she had email communications with this Herr (her boyfriend) in the hours after her encounter with Bryant.
I thought that Kobe denied having sex with her until his DNA showed up. You're saying that it wasn't in her - where was it?