A pedestrian found a man, bloodied and beaten, yelling for help from the window of a northeast Columbus house.
Columbus Police were called to the 2100 block of Agler Road just before noon Saturday.
Officers said Arron Weimer, 30, was transported to Riverside Hospital in critical condition.
Police are still trying to figure out Weimer's relationship to the house. Officers said they don't know if he lived there or if he was just visiting, but he did not appear to have been held against his will.
Police spent Saturday afternoon collecting evidence from inside the residence and the backyard. They also towed a vehicle that was parked in the driveway.
Anyone with information about the incident is asked to call Columbus Police at (614) 645-4730.