An Upper Darby man accused of seriously beating his infant son waived his right to a preliminary hearing in district court yesterday.

Henry Paris 3d, 32, of Taylor Avenue, turned himself in to police earlier this month after investigators had launched a search for him. He was charged with aggravated assault, simple assault and endangering the welfare of a child after his 3-month-old son, Henry 4th, suffered injuries that could result in permanent brain damage.

Paris could face 27 years in prison if convicted on all charges, Delaware County Deputy District Attorney Michael Galantino said.

A judge yesterday reduced Paris's bail from $250,000 cash to 10 percent of $100,000, Galantino said.

It was unclear whether Paris had posted bail. Employees in the records department at the George W. Hill Correctional Facility referred questions to the warden, who could not be reached for comment. Paris' public defender also could not be reached.

An arraignment at the Delaware County Court of Common Pleas was scheduled for Jan. 22.

- Joelle Farrell