An Oxon Hill man paroled from federal prison after murder and robbery convictions was charged yesterday in the beating death of his 8-month-old son, authorities said.

James Lee Sarvis, 42, of the 1000 block of Kennebec Street, was arrested on a warrant for first-degree murder and child abuse in the Sept. 4 death of James Darzel Sarvis, Prince George's County police said.

According to an autopsy conducted by the D.C. Medical Examiner's Office, the Sarvis infant, who was taken to Children's Hospital Sept. 1, died of blunt force trauma injuries to his head, abdomen and back. The autopsy showed that the baby suffered severe bruises to the brain, a crushing injury to his liver, and lacerations to the pancreas, said Beverly Coleman-Miller, special assistant to the health commissioner. The infant also had old and recent fractures of the ribs and legs and had contracted pneumonia, Coleman-Miller said.

"This child suffered hugely and for a long time," said a law enforcement source familiar with the case. "There is evidence that the child was battered for months."

The child was taken on Sept. 1 to a family doctor who admitted him to Children's Hospital. Sarvis later told police that the child had fallen a short distance off a bleacher, sources said.

Lorton prison records show that Sarvis was sentenced to 25 years for first-degree murder in November 1970 and later was transferred to a federal prison at Lewisburg, Pa. Records from the Federal Bureau of Prisons show that Sarvis entered the Lewisburg facility in November 1980 after being convicted of robbery, burglary and second-degree murder, and was paroled on Sept. 23, 1982. He was being held without bond last night at the Prince George's County jail.