Big blow to the prosecution’s already flimsy case.

Via NRO:

Lead police investigator Christopher Serino testified today that Trayvon Martin’s father, Tracy Martin, said that the screams for help captured in a 911 call did not belong to Trayvon Martin.

Serino let Martin listen to the recording before asking, “Is that your son’s voice in the background?” Serino recalled that Martin “looked away, and under his breath, as I interpreted it, said ‘no.’”