A grand jury declined to indict Francisco A. Trujillo in the killing of Mario Alberto Perez, the Montgomery County State’s Attorney’s Office announced Friday afternoon.

Trujillo, 35, said he shot and killed Perez, 40, early the morning of Dec. 21 after Perez threatened Trujillo inside his own home in Damascus, Maryland.

“It was a surreal, tragic experience,” Trujillo told News4 on Friday.

The construction executive was hosting a small holiday gathering on the 24600 block of Ridge Road just days before Christmas when his acquaintance drunkenly started an argument with him, he said. Perez threatened to kill Trujillo, his wife and his children, who are 8 and 4 years old and were home at the time.