India, Jan. 6 -- The investigation into the chilling murders of an Ohio dentist and his wife inside their home seems to have hit a roadblock, with the police failing to zero in on a suspect more than a week after the killings.

As the search for the suspect intensifies, the Columbus Police on Monday released a video of a person of interest in the double homicide. It marks the first time the police have reached out to the public seeking help in identifying the suspect.

The couple, dentist Spencer Tepe and his wife Monique, were found fatally shot during a welfare check at the home on North 4th Street in Columbus on December 30. "Two small children were also found in the residence unharmed," Columbus police had said.

The incident has puzz...