There are lots of new developments in the George Zimmerman's murder trial.
A judge ruled that the defense may show jurors that Trayvon Martin had small amounts of marijuana in his body when he died.
More doubt could be placed by a lead investigator about the much-debated 911 call.
Sanford Police Detective Chris Serino described how Martin's father responded when asked if he thought it was his son screaming on the call.
Trial Attorney Heather Hansen was live on "Good Day Philadelphia" Tuesday to talk about what all of this means.