A 16-year-old Waldorf girl was charged yesterday with three counts of manslaughter by auto and several other traffic offenses stemming from an accident last month that killed three passengers in the car she was driving, Prince George's County police said.

Pamela Sue Lee of 225 Garner Ave. also was charged with driving under the influence of alcohol, reckless driving, driving without a license and several speeding violations.

The charges were filed in Prince George's County Juvenile Court, said Cpl. Bruce Gentile, a police spokesman, but officials released Lee's name because it already had been released after the accident on May 4.

Investigators originally thought that Norman Benzing, 20, of 430 University Dr., Waldorf, was driving the 1986 Chevrolet Blazer that went out of control about 11:20 p.m. in the 10,000 block of Cedarville Road, collided with several trees and exploded.

When police arrived at the accident, Benzing, who survived the crash, and Lee were outside of the truck.

"We assumed Benzing was the driver because he was the owner and because Pam Sue Lee did not have a driver's license," Gentile said.

"But apparently Benzing was a passenger in the front seat," he said.

The investigation was stymied because Benzing and Lee were hospitalized after the accident and detectives could not interview them initially, Gentile said.

Both have been released from local hospitals, he said.

Killed in the accident were Marcy Davenport, 18; Thomas W. Scholfield, 19, and Albert L. Nagy, 21, all of Waldorf.

The five young people had left a video arcade in Waldorf and were going to a private party, police said.