BOSTON -- A Saudi prince, who spent a year in a Martha’s Vineyard jail for running down a Cambridge landscaper while drunk, may be sent back to jail if a judge finds he violated his probation.

Bader Al Saud, 26, has been ordered to appear in Suffolk Superior Court on Friday to answer allegations he failed to follow the terms of his probation, court records show. His whereabouts are “unknown,” according the records.

The development outraged the family of Orlando Ramos, 37, who believe the Saudi royal was given lenient treatment by prosecutors. The Vineyard jail is a converted home and inmates live in a dormitory setting.

“These latest allegations amplify their belief that the criminal justice system has failed them,” family attorney Richard A. Eustis told the Boston Herald.

The terms of probation required that Al Saud report to probation officers after his release. A spokeswoman for the Commissioner of Probation could not explain how the office lost track of Al Saud.

Al Saud pleaded guilty in 2005 to a reduced charge of misdemeanor motor vehicle homicide as part of a plea deal that allowed the prince to serve a one-year sentence on the island with another year of jail time suspended.

Ramos died after being struck by Al Saud’s leased BMW SUV as Ramos walked in a crosswalk near Boston Common.

Al Saud had been drinking with friends at a nearby bar, court records show.

Al Saud, who did not have a Massachusetts driver’s license, was legally drunk and speeding when he struck Ramos.

Al Saud’s attorney said he has been living in Riyadh, Saudi Arabia since his release from jail.

“It is my opinion that the defendant presents no risk to anyone and that his probation (requirement) can be dismissed,” Arnold R. Rosenfeld wrote in a motion filed with the court.