Francine Graham

The assailants killed 40-year-old Detective Joseph Seals, who had been a police officer since 2006; 33-year-old female store owner Mindy Ferencz, a mother of three; 49-year-old employee Douglas Miguel Rodriguez, who was originally from Ecuador; and 24-year-old male rabbinical student Moshe Deutsch, who was a customer of the store.

Two officers, one male and one female, were wounded in the shootout and were released from the hospital the same day.

A wounded man escaped out the back door of the store.

He was treated at Jersey City Medical Center, and released the same day.

On December 11, the shooters, both of whom were killed by police during the siege, were identified as David Nathaniel Anderson (age 47) and his girlfriend Francine Graham (age 50).

Anderson and Graham were suspects in the murder of Uber driver Michael Rumberger in Bayonne the weekend prior to the attack.

Rumberger's blood was found on a Bible that belonged to the assailants, and his DNA was on their clothes and one weapon.

Anderson and Graham had Googled the meaning of the surname "Rumberger".

Anderson and Graham were also suspects in an incident a week before the Jersey City shooting, when on December 3 two shots were fired at a vehicle which was being driven by a person who was clearly identifiable as being Jewish, on U.S. Route 1/9 near Newark and Elizabeth, New Jersey.

The vehicle's rear window was shot out.

Graham's phone was in the area at the time of the shooting, and it was later determined the ballistics matched a gun linked to the two assailants.

On December 10, 2019, a shooting took place at a kosher grocery store in the Greenville section of Jersey City, New Jersey.

Three people were killed at the store by two assailants, David N. Anderson and Francine Graham.

The assailants also wounded one customer and two police officers before being killed by police during an ensuing shootout.

A Jersey City Police Department detective had also been shot and killed by the assailants at a nearby cemetery just before the grocery store attack.

Anderson, who had connections to extremist groups, had a history of posting antisemitic and anti-law enforcement messages on social media; New Jersey Attorney General Gurbir Grewal stated that evidence indicated that the attacks were acts of hate and domestic terrorism which were fueled by antisemitism and anti-police sentiment.

Authorities believe that a much larger attack had been planned, but it was thwarted by the police detective's intervention at the cemetery.

The shooting was part of a wave of violent attacks against Jews in the United States.

On December 10, 2019, a police detective, who was meeting a confidential informant, came across the assailants at the Bayview Cemetery in Jersey City, New Jersey in what was described as a chance encounter.

It is believed that he approached the suspects, who were in a stolen U-Haul van that was linked to the murder three days before of 34-year-old Jersey City resident Michael Rumberger in nearby Bayonne, New Jersey.

The assailants shot and killed the officer.

His body was discovered by a bystander and reported at 12:38 p.m.

The suspects immediately fled in the stolen van and drove about one mile to a kosher grocery store, the JC Kosher Supermarket in the Greenville section of Jersey City, and they opened fire immediately after they exited the vehicle; the assault was exclusively directed towards the store, and bystanders in the street were ignored as a result.

The two shooters wielded an AR-15-style weapon and Mossberg 12-gauge shotgun, respectively; a 9-millimeter semi-automatic Ruger and a 9-millimeter Glock 17 were also found in the store.

At approximately 12:21 p.m., while wearing tactical gear, they entered the store and fatally shot the owner, an employee, and a customer.

Authorities believe that the three victims were killed "within minutes" of the shooters' attack on the market.

The employee of the store was reported to have been killed holding the back door open so that others could escape.

Two other customers were able to escape.

In the ensuing shootout, the assailants exchanged gunfire with the police for more than three hours before they were shot and killed.

A BearCat armored personnel carrier rammed through the storefront, ending the siege.

Hundreds of shell casings were ultimately found at the scene.

The van was later found to contain a live pipe bomb that had the capacity to kill or injure people up to 500 yards away; the van had also been lined with homemade ballistic panels made of material from bulletproof vests.

The suspects were also found to have material that could be used to make a second bomb.

Investigators also found a .22-caliber Ruger Mark IV handgun equipped with a homemade silencer and a homemade device to catch shell casings.

Multiple law enforcement agencies responded to the scene: the Jersey City Police Department, the Jersey City Fire Department Rescue Task Force, the Hudson County Sheriff's Office, the New Jersey State Police, the Bureau of Alcohol, Tobacco, Firearms and Explosives, the Federal Bureau of Investigation, the Port Authority of New York and New Jersey Police Department, the New York City Police Department and departments from other neighboring municipalities, and sheriffs from three counties.

Anderson and Graham bought a number of weapons, and trained to use them in Ohio; video footage showed the pair undertaking target practice with long guns in Austintown, Ohio, on December 1, 2019.

Before they engaged in the attack, they researched another possible attack on a Jewish community center in Bayonne.

Video footage showed Anderson and Graham appearing to scout the JC Kosher Supermarket several times in the week leading up to the attack, including a drive-by an hour and a half before the shooting; authorities ultimately concluded the attack had been planned for months, and that during their reconnaissance, the attackers had entered the JC Supermarket on at least one occasion.

A Jewish day-school with 50 students was in the same building, leading Mayor of Jersey City Steven Fulop to believe that the building had been chosen partly for this reason.

In January 2020, officials announced that evidence showed that Anderson and Graham had planned much larger attacks against both the Jewish community and law enforcement which could have resulted in dozens of casualties or more, but that the intervention by Detective Seals had disrupted these.