ATLANTA — Authorities today swarmed a heavily wooded area in north Georgia where a wrecked red Jeep belonging to a former professor suspected of killing his wife and two others was discovered not far from his home.

There was still no sign of George Zinkhan, however. More than 40 law enforcement officers were searching a 200-acre area. Some officers in pickup trucks drove down dirt roads and helicopters searched from above.

Zinkhan has been missing for nearly a week. His Jeep was found overnight "well off the beaten path" in a ravine in Bogart, a rural community about 10 miles west of Athens, where Zinkhan lived and taught marketing at the University of Georgia's Terry College of Business, FBI agent Greg Jones said.

Authorities across the nation and in Europe have been looking for Zinkhan, 57, since the April 25 shootings.

Zinkhan is accused of killing his wife, 47-year-old attorney Marie Bruce, and two members of her community theater group, Ben Teague, 63, and Tom Tanner, 40, in front of a theater in Athens.

Police hadn't previously revealed a motive, but Jones said today interviews with friends and family indicate the shooting likely stemmed from a domestic dispute between Zinkhan and Bruce. Authorities have some indication she was preparing to file for divorce, he said.

The Jeep likely had been in the ravine since shortly after the shooting,