Lt. Randy Harris says 23-year-old Jared Foster was arrested Wednesday for investigation of cruelty to animals. Bail was set at $20,000.
Harris says Foster's brother came home to find the dog in the backyard of the family's Castaic home, blood inside the house and his brother acting irrationally. He left to call deputies.
Harris says deputies talked Foster out of the house, located in north Los Angeles County, and found the dead cat inside.
The men's parents were out of town. Calls to the house Thursday rang unanswered.