GIRL HELD IN HS SLAY

16-yr.-old knifed classmate: cops

A WESTCHESTER COUNTY high school student was jailed without bail Thursday after surrendering to police in the fatal stabbing of a teen classmate at a Dunkin’ Donuts.

Z’inah Brown, 16, turned herself in after 24 hours on the lam following the killing of Valaree Schwab — who was stabbed twice with a steak knife on the left side of her torso, according to cops.

She stood mutely during a brief New Rochelle City Court appearance in which she was held without bail on a second-degree murder charge pending a Wednesday hearing.

“She’s doing all right,” said Legal Aid defense time.” attorney Edward Barrett. “There’s really nothing to say at this

Distraught family members refused to speak with reporters at the courthouse, instead hugging each other as Brown was taken to her cell.

Brown, barely a week short of her 17th birthday, made no statement to police when she arrived at police headquarters at 1 p.m.

Brown (inset) fled the Dunkin’ Donuts immediately after the Wednesday lunch-hour stabbing, leaving behind the dying teen, a fellow student at New Rochelle High School, cops said.

Schwab, 16, was pronounced dead at Jacobi Medical Center in the Bronx, authorities said.

Police said they had surveillance video lifted from the Dunkin’ Donuts about a half-mile from the school, and the murder weapon was recovered.

High school classmates of the suspect and victim were greeted Thursday by a heavy police presence at the school.