Fort Worth police got an anonymous phone call early Friday morning that led them to a home where they found a man covered in blood carrying a Bible and a woman also covered in blood and beaten to death with trauma to her face and upper body.

The man, identified as 23-year-old Alexander Taylor Valdez, told arriving police officers he “was doing witchcraft to kill my mom,” and that she was dead inside the home, KTVT reported. Police also found a dead dog in the room.

Valdez told police it was “an exorcism” as he walked out of the home and sat on the front porch. Police found 58-year-old Teresita Sayson dead in the home’s master bedroom. According to an arrest warrant, police say Valdez hit her multiple times with an object, possibly a jewelry box found at the scene with blood and hair consistent with his mother.

The anonymous caller who brought police to the home around 1:30 a.m. told dispatchers they’d received a photo via Snapchat that showed a woman covered in what appeared to be blood.

After he was brought to police headquarters for an interview, Valdez stopped talking and asked for an attorney.

He was charged with murer and ordered held on a $750,000 bond.