Prosecutors on Friday filed four counts of gross vehicular manslaughter while intoxicated against the physically disabled woman accused of driving into a crowd of people leaving a Christmas concert at a Redondo Beach church, fatally injuring three adults and a 6-year-old boy who died late Thursday.

Margo Julie Bronstein, 56, of Redondo Beach was wheeled into court in a sitting position on an ambulance gurney for her arraignment at the Torrance courthouse. She pleaded not guilty to the charges. In addition to manslaughter, she faces one count of driving under the influence causing bodily injury.

Bronstein did not speak during her arraignment. She appeared to be handcuffed to the gurney and had an intravenous tube attached to her left arm. Her attorney, Jeffrey Gray, said she is devastated by what happened.

“She is a decent human being and any human being is devastated by even an accidental death, which is what this truly is,” Gray said. “She is a person who has a soul. … She’d do anything to get in a time machine and go back 72 hours. It’s devastating, a simple accident.”

Gray would not reveal any statements Bronstein has made to him. She also was injured when she crashed head-on into another car after striking the pedestrians.

“My concern is there tends to be a lot of almost a mob mentality about this case,” Gray said. “It’s a tragedy. It’s not fair to Miss Bronstein. It’s not fair to the decedents’ families to speculate on what happened.”

Police said Bronstein is suspected of being high on prescription drugs when she struck about a dozen pedestrians in a crosswalk Wednesday evening at Pacific Coast Highway and Vincent Street. The victims were leaving St. James Parish School’s “Christmas Sing,” a performance that began about an hour earlier.

Bronstein’s white Saturn sedan allegedly maneuvered around vehicles stopped at a red light, slammed into the pedestrians in the crosswalk, veered head-on into a passing Honda Fit and finally came to a stop when she hit a southbound sport utility vehicle, witnesses said. One pedestrian reportedly remained on the hood of her car.

Samuel Gaza, 6, who was wedged under her car, suffered head trauma and a bruised lung. He was pronounced dead at a nearby hospital at 11:35 p.m. Thursday.

His mother, Martha Gaza, 36, of Torrance, also perished in the crash, along with fellow Torrance residents 81-year-old Mary Ann Wilson and Saeko Matsumura, 87. Gaza’s husband and two daughters also were injured.

Members of St. James Parish were notified of Samuel’s death in an email Friday.

“He is with his mom now,” the email from several parish priests said. “Let us all join in prayer for (the families). Let us all keep each other in prayer as we continue our faith-filled support of all members of our school and parish communities.”

The archdiocese said it plans to set up a bank account to collect donations for the families’ funeral costs.

In court Friday, Judge Thomas Sokolov entered Bronstein’s not-guilty plea for her and set her next hearing for Jan. 14. It was not clear whether Bronstein’s case will continue in the Torrance courthouse or be sent downtown. Deputies prefer cases with defendants in wheelchairs or with medical conditions to be held downtown to make transportation easier.

Two ambulance attendants, along with bailiffs, stood next to her in the courtroom.

Deputy District Attorney Laura Jane Kessner requested that Sokolov raise Bronstein’s bail to $500,000 from the initial $300,000 because of the four deaths. Gray countered that her bail should be $100,000, calling the crash a “single event.” The judge agreed to raise the bail to $500,000.

Outside the courthouse, Gray told reporters that no one should speculate about why the crash occurred. He said he will explore whether her car, which was fitted with hand brakes, malfunctioned or whether she had an adverse reaction to prescription medication.

“It appears everybody is jumping to conclusions about this case,” Gray said. “We have no toxicological level. We have no blood-alcohol level.”

Gray said Bronstein does not live recklessly, and described her as a “fish out of water” in jail. He said she has natural birth defects and requires crutches and a walker to walk, and special hand controls in her car. Department of Motor Vehicles records show she was required to have hand brakes to drive.

“She is aware that people have passed away and there has been an accident,” the attorney said. “Obviously she feels terrible. This is nothing more than an accident.”

If convicted as charged, Bronstein could spend about 40 years in state prison.

Bronstein lives in a beach-facing apartment complex called Seaside Villa, just a few blocks from the crash scene. According to her Facebook page, she is an avid Disneyland fan who is originally from Chicago. On Tuesday, she celebrated her birthday at Disneyland with several friends and posted numerous smiling photos online in front of Christmas trees, theme park rides and costumed Disney characters. She has family in Washington, Gray said.

Meanwhile, Wilson’s husband, John, said Friday that he hadn’t visited the crash scene and didn’t want to. His wife cared for him because medical troubles made it hard for him to get around. Just hours before the crash, Mary Ann Wilson stopped at a neighbor’s house to deliver a plate of marble and spice cakes.

“She was just at the wrong place at the wrong time,” John Wilson said. “My daughter is taking it really hard. It’s hard.”