Kyle Zepeda III was a 45-year-old man who tried to help a family member in distress, an act of concern that ended in his death. On the afternoon of December 19, 2019, Zepeda and his wife went to a home on Camberly Street in Port St. John, Florida. Her brother, Daniel Diemer, was reportedly causing a disturbance in the garage apartment of his mother’s house, and the couple hoped to calm him down.
When they arrived, Zepeda, who was unarmed, approached the side door of the garage. What happened next was captured on a cell phone video recorded by Zepeda’s wife. Diemer met his brother-in-law at the door, then immediately retrieved a handgun from a table inside the apartment. He pointed the gun at Zepeda’s head and pulled the trigger. After shooting him at close range, Diemer briefly looked down at the dying man as his sister screamed, and then closed the door.
Zepeda was rushed to a nearby hospital, but he succumbed to his injuries.
A neighbor who heard the commotion confronted Diemer in front of the house moments later and held him at gunpoint until deputies from the Brevard County Sheriff’s Office arrived. Diemer was taken into custody and charged with second-degree murder. During the investigation, authorities learned that Diemer’s mother wanted him to move out of her house, and that Zepeda and his sister had refused to let him move in with them. Diemer reportedly told the neighbor that he shot Zepeda because he didn’t like him.
Following a court-ordered evaluation, Circuit Judge Steve Henderson found Diemer competent to stand trial. The six-day trial concluded in February 2026. Prosecutors presented the jury with conclusive evidence, including the harrowing phone video that showed Diemer coolly shooting his brother-in-law. After deliberating for less than 30 minutes, the Brevard County jury found Daniel K. Diemer, then 32, guilty of second-degree murder. As of February 2026, a sentencing date had not yet been scheduled.
