(NEW YORK) — New York City police are searching for a man on parole who allegedly broke into a Queens home, killed a couple and set their house on fire, authorities said.

Frank Olton, 76, was found on Monday tied to a pole in his basement suffering from multiple stab wounds, and his wife Maureen Olton, 77, was found on the house’s first floor, severely burned, NYPD Commissioner Jessica Tisch said at a news conference on Tuesday.

The Oltons’ son, a New York City Fire Department paramedic, was alerted to the fire by an alarm system and he responded to the house, police said.

There’s no known connection between the victims and the suspect, identified as 42-year-old Jamel McGriff, Tisch said.

Detectives believe the suspect spent five hours in the victims’ house, according to sources, likel

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