Police are currently searching for a “person of interest” in the quadruple murder of a family and their housekeeping in an upscale Northwest neighborhood.

46-year-old Savvas Savopoulos, his wife, 47-year-old Amy Savopoulos, their 10-year-old son Phillip, and one of their housekeepers, 57-year-old Veralicia Figueroa were found dead in their home last Thursday.

Authorities responded to reports of a fire at their home and when they arrived at the scene and put out the fire, they found the four bodies inside the home. According to the Metropolitan Police Department, all four died as a result of blunt or sharp-force trauma, leading police to investigate their deaths as a homicide.

Over the weekend, police released a video of a “person of interest” in connection to the homicide. According to police, the person of interest was “possibly operating a blue 2008 Porsche 911 sports car that was located abandoned in the 8000 block of Annapolis Road, in New Carrollton, Maryland.”

The Post reports that the Porsche was found burning in the back of a church parking lot.

It’s one of several mysterious aspects of the case that have left police baffled as to what happened to the Savopoulos family and their housekeeper. According to the Post, the family had another housekeeper who was supposed to come in Thursday, but was told not to by Savvas:

Nelitza Gutierrez, the housekeeper who received the messages and has worked for the family for 20 years, said in an interview Saturday that the series of messages left her with the impression that something was amiss with her employers. She said Savvas Savopoulos told her in person Wednesday that his wife had plans to go out, but said in the voice mail left that night that Amy Savopoulos had been sick in bed all day.

“It was something very suspicious because I felt his voice was really tense,” Gutierrez said in Spanish. “And it was different than what he had said to me before.”

Police are offering a reward of up to $25,000 to anyone who provides information leading to an arrest. Anyone with information should call (202) 727-9099, or send an anonymous tip via text to 50411.