A 2014 photo resurfaces: The key to unlocking the tragedy and the true face of the killer

Authorities investigating the apparent shooting deaths of a dentist and his wife in Ohio released security video Monday of a person of interest in the case.

Columbus police said the video was recorded between 2 a.m. and 5 a.m. Dec. 30 in an alley next to the Columbus home of Dr. Spencer Tepe, 37, and Monique Tepe, 39.

In a statement, the police department said investigators believe the couple were killed on the top floor of their home during that three-hour window.

The brief video shows a person walking in the alley wearing light-colored pants and a hooded dark jacket.

The department asked the public for information about the identity of the person and said detectives are following up on numerous tips.

Authorities discovered the Tepes’ bodies after several 911 calls from colleagues and loved ones on the morning of Dec. 30. Among the callers was a friend who reported having found Spencer Tepe’s body next to his bed.

The couple appeared to have been shot, according to an incident report.

The Franklin County coroner’s office told NBC Chicago on Monday that the pair died in an apparent homicide by gunshot wounds, adding that the case is not finalized and that additional reports are pending.

Three 9 mm shell casings were found in the family’s home, a preliminary investigative report shows. The couple’s two young children were in the house unharmed.

Authorities have not identified a possible motive. The police department previously said it does not believe the killings were a murder-suicide.

Spencer Tepe worked at a dental practice in Athens, Ohio, where he focused on comprehensive dentistry and implant therapy, according to a company biography.

The Tepe family has described the pair as “extraordinary people whose lives were filled with love, joy, and deep connection to others.”

“Our family is devastated by the tragic and senseless loss of Spencer and Monique,” the family said in a statement.