Details continue to emerge on the killing of the 17-year-old Florida teenager Trayvon Martin. According to ABC News, the lead homicide investigator at the crime scene called for manslaughter charges against Martin’s shooter, George Zimmerman, on the night of the shooting. In an affidavit, the investigator, Chris Serino, said he had doubts about Zimmerman’s account. Serino was overruled by the state attorney’s office, which accepted Zimmerman’s claim of self-defense.