As upgraded charges of vehicular manslaughter were unsealed yesterday in a Riverhead courtroom, Shea Rosen stared straight at the judge while family members of the jogger he's charged with killing tried to hold back tears behind him.

Rosen, 19, of Brookville, pleaded not guilty to second-degree vehicular manslaughter, drug possession and other charges before Suffolk County Court Judge Martin Efman. The homicide charge alone carries a maximum prison term of 2 1/3 to 7 years.

On the evening of Nov. 6, Rosen was high on marijuana and Xanax when he got behind the wheel of his sport utility vehicle and struck a pair of Huntington joggers working their way into the fifth mile of a six-mile training run, Suffolk prosecutor Patricia Brosco said in court.

Amanda Malloy, 29, a schoolteacher, died of her injuries. Her running partner, Vincent Saunders, 32, of Huntington, survived but suffered a torn aorta, a broken femur and a collapsed lung, among other injuries. Relatives have said he is recovering from surgery at The Mount Sinai Hospital in Manhattan, but he is no longer listed as a patient there.

Police said the 2000 Dodge Durango struck the runners and dragged both along New York Avenue before Rosen realized he had hit anyone. Rosen was initially charged only with driving while impaired by drugs, a misdemeanor.

Yesterday, Brosco detailed in court four other car accidents she said Rosen caused this year, including an April 16 collision that she said left three people hospitalized.

"Obviously when Shea Rosen is behind the wheel of a car, people's lives are at risk," Brosco said, and asked that bail remain at $1 million bond or $500,000 cash.

Rosen, handcuffed and wearing green jail-issue scrubs, stood stiffly and kept his eyes on the judge throughout his appearance.

Rosen's lawyer, Joseph Conway of Mineola, called the bail "excessive" and asked Efman to lower the figure to give his client's family a "fighting chance" of raising the money.

Efman kept bail set where it was.

Conway declined to comment outside court, as did Rosen's parents, who brushed past reporters.

Several members of Malloy's family also came to the courthouse yesterday. Some shed tears during the arraignment. None spoke to reporters.

Credit: BY ERIK GERMAN. erik.german@newsday.com