A New Canaan woman charged in March with reckless driving for causing a four-car crash last year now faces a civil suit filed on behalf of the 18-year-old Stamford man who was severely injured in the accident.

Carol Sung, 51, was driving her 2010 Chevy Tahoe unreasonably fast on Silvermine Road before the Oct. 30 crash that seriously injured Michael Bivona Jr., according to the lawsuit.

An event recorder in her car indicated she was going more than twice the 30-mile-per-hour speed limit on the road, police said.

New Canaan police asked the hospital to test Sung for alcohol or drugs, but the hospital failed to do so, according to police reports.

Sung did not pass field sobriety tests administered at the scene, according to affidavits.

“The credible information is leading to the conclusion she was the cause of this crash so that’s why we’re suing here,” Bivona’s New Haven-based civil attorney John Parese said. “He is getting better but he continues to have ongoing problems and struggles every day.”

The crash occurred about 5:30 p.m. Oct. 30 when Sung's vehicle rear-ended the BMW while heading west on Silvermine Road. The BMW then crossed the road into oncoming traffic and struck Bivona’s 2003 Subaru head-on as well as the car of a 41-year-old Wilton woman, according to police.

Firefighters used cutting tools to remove Bivona, who was badly pinned in the heavily damaged compact car, according to fire officials.

When police arrived, Sung's vehicle was rolled on its side in a wooded area, and the three other cars were seriously damaged.

The other two drivers involved in the accident were treated at local hospitals for non-life-threatening injuries. Sung suffered a bloody nose, according to affidavits.

Sung appeared Monday in state Superior Court in Stamford on her reckless driving charge.