Abraham, a neighbor of the dead couple, says the infant succumbed to his injuries overnight at Bellevue Hospital. He said the child, about three pounds, sustained brain and other internal injuries.
Abraham called the couple's death "a tragedy beyond (belief) just coming off a joyous holiday as Purim" as they were getting ready to welcome their first child.
Abraham often speaks publicly for the different sects in the ultra-orthodox community, which has strict rules governing clothing, social customs and interaction with the outside world. Men wear dark clothing that includes a long coat and a fedora-type hat and often have long beards and ear locks.
Police are trying to track down the driver of the BMW that slammed into a livery cab in Brooklyn Sunday, killing a couple expecting their first child. Detectives believe they know the driver's name, and are showing his photo to possible witnesses.
The woman who had co-signed the BMW's lease is charged with insurance fraud. Takia Walker, 25, of the Bronx, is charged with allowing a third party to use the vehicle without notifying the insurance company. Walker allegedly acquired the car under false pretense and let a third party who was not on the insurance drive it.
The BMW slammed into the car carrying Nachman and Raizy Glauber, both 21, at an intersection in Williamsburg, said Abraham, a neighbor of Raizy Glauber's parents who lives two blocks from the scene of the crash.
The engine of the livery car ended up in the backseat, where the pregnant woman was sitting before she was ejected, Abraham said. Her body landed under a parked tractor-trailer, said witnesses who came to the scene after the crash. Nachman Glauber was pinned in the car, and emergency workers had to cut off the roof to get him out, witnesses said.
Both of the Glaubers were pronounced dead at hospitals, where doctors performed a Caesarean section on the mother to deliver the baby. Both parents died of blunt-force trauma, the medical examiner said.
The Glaubers' livery cab driver was treated for minor injuries at the hospital and was later released. Both the driver of the BMW and a passenger fled and were being sought, police said.
On Saturday, Raizy Glauber "was not feeling well, so they decided to go" to the hospital, said Sara Glauber, Nachman Glauber's cousin. Abraham said the Glaubers called a car service because they didn't own a car, which is common for New Yorkers.
The Glaubers were married about a year ago and had begun a life together in Williamsburg, where Raizy Glauber grew up in a prominent Orthodox Jewish rabbinical family, Sara Glauber said.
Raised north of New York City in Monsey, N.Y., and part of a family that founded a line of clothing for Orthodox Jews, Nachman Glauber was studying at a rabbinical college nearby, said his cousin.
Brooklyn is home to the largest community of ultra-Orthodox Jews outside Israel, more than 250,000. The community has strict rules governing clothing, social customs and interaction with the outside world. Men wear dark clothing that includes a long coat and a fedora-type hat and often have long beards and ear locks.
Jewish law calls for burial of the dead as soon as possible, and hours after their deaths, the Glaubers were mourned by at least 1,000 people at a funeral outside the Congregation Yetev Lev D'Satmar synagogue. Men in black hats gathered around the coffins in the middle of the street, while women in bright headscarves stood on the sidewalk, in accordance with the Orthodox Jewish tradition of separating the sexes at religious services.
The sound of wailing filled the air as two coffins covered in black velvet with a silver trim were carried from a vehicle. A succession of men and women delivered eulogies in Yiddish, sobbing as they spoke into a microphone about the young couple. "I will never forget you, my daughter!" said Yitzchok Silberstein, Raizy Glauber's father.
Afterward, the cars carrying the bodies left and headed to Monsey, where another service was planned in Nachman Glauber's hometown.
"You don't meet anyone better than him," said his cousin. "He was always doing favors for everyone."
She said Nachman's mother herself just delivered a baby two weeks ago.
"I've never seen a mother-son relationship like this," Sara Glauber said. "He called her every day to make sure everything was OK. He was the sweetest, most charming human being, always with a smile on his face."
She added that, of him and his bride, "if one had to go, the other had to go too because they really were one soul."
The Associated Press contributed to this report.