Casey Emmer called 911 Monday night to report a break-in and stabbing at his Great Falls home. When police arrived, they found Emmer’s father dead — and they charged Emmer in the killing.

Police were called to the house Emmer, 25, shared with his parents in the 1200 block of Colvin Meadows Lane about 10:15 p.m., Fairfax County police said.

When officers arrived, they found Lawrence Emmer, 62, dead with wounds to his upper body, said Officer Bud Walker, a police spokesman.

The two were the only ones in the house when officers arrived, according to police, who allege that Emmer made up the story about the break-in.

“We determined that there was no break-in and that the caller, Casey Emmer, was in fact the suspect in the homicide,” Walker said. Police declined to comment on a possible motive in the killing.

Emmer was arrested and charged with second-degree murder.

He was arraigned Tuesday morning at the county Juvenile and Domestic Relations District Court and is in jail, police said. No bail information was available.

A hearing is scheduled for Aug 5.

The killing was the county’s sixth homicide this year.