ARUNDEL — A 23-year-old Maine man charged with assaulting his 2½-month-old son entered no plea during his video appearance in Springvale District Court today.

Gordon Collins-Faunce was formally charged with elevated aggravated assault and continues to be held in York County Jail on $100,000 bail.

The Maine State Police say detectives arrested Collins-Faunce at his home in Arundel Sunday evening. Court papers describing the police case against Collins-Faunce were impounded by a judge at the request of a prosecutor for the York County District Attorney’s Office.

The baby boy was hospitalized Saturday after he was found unresponsive at his home by other family members. The baby was transferred to Maine Medical Center in Portland with severe head injuries and police reported his condition as “grave.”

A spokeswoman there said she could provide no information about the boy’s condition or even confirm that he is a patient there.

State police are monitoring the infant’s condition and say the prognosis is not good.

“If the boy should die, the Attorney General’s Office has already been brought into the loop,” said state police spokesman Steve McCausland. The Attorney General’s Office prosecutes all homicides.

The Maine Department of Health and Human Services removed two other children from the house on Saturday, the injured boy’s twin brother and a three-year-old sibling.

The injured boy lives with Collins-Faunce and his mother, 23 year old Christina Henderson.

McCausland said Collins-Faunce is employed as a highway construction flagger.

Collins-Faunce has no criminal record, according to the State Bureau of Identification.