Jurors see gun used in shooting during Derek Medina murder trial

The murder trial for a South Florida man who claims that he killed his wife in self-defense before posting a photo of her corpse on Facebook continued Friday as the lead crime scene investigator showed the jury some of the key pieces of evidence.Derek Medina is accused of fatally shooting Jennifer Alfonso, 27, in the kitchen of their South Miami townhouse in August 2013. Police said Medina uploaded a photo of Alfonso's body on Facebook after the shooting.Lead crime scene investigator Yvonne Garc