The state Department of Correctional Services said yesterday that Williams was convicted of manslaughter for his role in a 1990 stabbing and served just more than two years. He also served about three years for grand larceny.

The National Transportation Safety Board and State Police are investigating Saturday’s crash, studying a data recorder and looking into the drivers’ actions before the deadly trip.

Police said the latest victim died yesterday morning at St. Barnabas Hospital in the Bronx.

The New York City medical examiner’s office said Sunday that the other fatalities — eight men and six women — all died of blunt force trauma. The bus scraped along a guardrail, toppled, and slid into a sign pole that sheared it end to end in a horrific scene of blood, jumbled bodies, and shattered glass. Some of the dead were tangled up with the living.