SUNBURY - A preliminary hearing for Erick R. Trometter, 22, who was shot by a police officer Tuesday while wielding a knife after allegedly beating and threatening his grandmother, will not be held until the defendant is arraigned on multiple charges, including a felony of aggravated assault.

Trometter, who remained in critical condition Thursday at Geisinger Medical Center, Danville, isn't expected to be arraigned on the charges until he's discharged from the hospital.

In addition to the felony, Trometter was charged Wednesday by Patrolman Scott Hause with a misdemeanor of simple assault and summary charge of harassment. The offenses were filed at the Sunbury office of Magisterial District Judge Benjamin Apfelbaum.

The resident of 618 Susquehanna Ave. has not been charged by state police at Stonington in connection with the shooting, which remains under investigation.

No new developments were reported in the case Thursday by Trooper Mark Reasner, a community service officer with state police at Milton.

State police have released few details about the shooting incident for investigative reasons. Northumberland County District Attorney Ann Targonski reiterated her previous stance Thursday that it's too early to make a comment about the probe.

Police said the 6-foot, 290-pound Trometter was shot once about 11:15 a.m. by Acting Police Chief Brad Hare after he confronted the officer while brandishing a knife on Mile Post Road near Shikellamy Avenue, just outside the city limits.

Unconfirmed reports indicate Trometter was shot in the stomach area. He was transported by ambulance to Geisinger, where he has remained in critical condition.

Hare, who escaped injury, is on administrative leave until the shooting investigation is completed by state police. Sgt. Christopher Blase is serving as acting police chief for the duration of the shooting investigation.

Hare was attempting to take Trometter into custody after police were informed that the defendant assaulted his 67-year-old grandmother, Amanda Trometter, at their residence in Sunbury at approximately 9:30 a.m. Hare deployed a Taser in an attempt to stun the defendant, but he was unsuccessful.

A temporary protection from abuse order signed by a county judge bars Trometter from any contact with his grandmother for up to three years and evicts him from their home. A PFA hearing is scheduled for 10 a.m. Wednesday in courtroom No. 4 at the Northumberland County Courthouse.

Amanda Trometter said her grandson hit her with a wooden broom handle Monday. He threatens her life daily and demands money from her, the petition states. He has spit on her and pulled her hair. He was arrested in 2011 after he stabbed her with a spoon and served 23 months in Northumberland County Prison.

Trometter, a 2010 Line Mountain graduate and honors student, appealed the sentence to the stabbing, saying it was too harsh. It was denied. A federal lawsuit he filed claiming abuse at the hands of guards at Northumberland County Prison remains pending.