BOWLING GREEN, Va. — Several survivors of a deadly bus crash in Virginia last year told a judge Thursday of their harrowing early-morning ride, describing how they swerved from side to side and changed speeds erratically before careening off an interstate highway.
After the testimony, a judge convicted Kin Yiu Cheung of four counts of involuntary manslaughter in the crash along Interstate 95 that killed four and injured dozens. The witnesses said the erratic driving occurred for up to an hour as Cheung drank coffee and Red Bull energy drinks. Finally, they said, he nodded off at the wheel and lost control of the low-fare Sky Express bus.
‘‘It was almost as if you’re on a roller-coaster ride,’’ passenger Karrica Finch said.
She said dozing passengers awakened by the vibration of the bus wheels on the highway shoulder’s rumble strips started screaming when they saw the driver slumped over.
‘‘I could hear people yelling, ‘He’s dead!’ and ‘We’re going to die! We’re going to die!’’ Finch said.
Passenger Andrew Jennings said the crash ‘‘was like a nightmare,’’ and LiDenne Cromartie testified that she was helping others out of the overturned bus when she encountered Cheung.
‘‘He said, ‘I’m sorry, I’m sorry. I [fell] asleep,’’ ’ Cromartie said.
Several witnesses also said Cheung acted angrily toward passengers, chastising and nearly leaving behind two women who got off the bus without his permission to use the restroom during a brief stop.
Caroline County Circuit Judge Joseph Ellis told Cheung that his conduct was ‘‘so gross and wanton,’’ he had no choice but to find him guilty. Cheung, who listened to the trial through an interpreter, was taken to jail to await his Jan. 23 sentencing. He faces up to 40 years.
Virginia State Trooper Andrea N. Vowell, who said the bus was still rocking when she arrived at the scene about 30 miles north of Richmond, testified that Cheung nodded when she asked whether he had fallen asleep at the wheel.
Cheung also wrote a statement saying: ‘‘Maybe I feeling tired and sleepy time.’’
Shirley Dai, who like Cheung speaks Mandarin, said she was riding in the front row when she heard the driver complaining on his cellphone that he doesn’t get enough rest.