Panama City Beach- Cold-blooded murder, according to Kris Foster, was what led to his youngest brother William Foster's tragic death Saturday morning in Panama City Beach.

"It was murder, 100 percent. He was murdered," said Foster.

And he wasn't the only one who saw it that way.

"I do not believe at all that he hit her. If anything it was self-defense on his part," said Foster's friend Selena Snell.

"It's his girlfriend's fault," said Foster's friend Bryan Wilson.

Foster's family and friends' claims go against what the Bay County Sheriff's Office labeled as a case of domestic violence. According to the incident report, deputies found Foster unresponsive in a bathroom at the family's home off Allison Avenue around 2:00 a.m.

His girlfried Shantal Acevedo was kneeling next to him crying. And while all this was going on, the couple's eight month old child was in the home, something the Florida Department of Children and Families is now looking into. It was a sad detail Kris Foster said proves his brother was not a violent person.

"He loved that baby. He would never do it," said Foster.

The events leading up to the shooting were still not clear Sunday, and the sheriff's office has provided few details as to what evidence has them believing it was an act of self defense. But Foster's family and friends wasted no time defending their loved one.

"My whole family was blessed to have him in our lives. He was just that guy that was there for everybody," said Snell.

"I lost my brother. That's my baby boy," said Foster.

As of Sunday, the sheriff's office said Acevedo was not a suspect and had not been arrested.