Nicholas Tartaglione made headlines in 2016 when the former Briarcliff Manor police officer was charged with killing four men in Orange County.

There have been various developments in his story as his case lingers, including this week, when WNBC reported that Tartaglione was questioned about jail-cell injuries found on financier and accused child sex trafficker Jeffrey Epstein.

Here's a timeline of events in Tartaglione's case and federal custody.

Dec. 19, 2016: Tartaglione, then 49, was arrested and accused of killing Martin Luna, Urbano Santiago, Miguel Luna, and Hector Gutierrez in and around the Likquid Lounge, a bar his brother operated in Chester. He was also charged with conspiracy to distribute five kilograms or more of cocaine, and federal prosecutors said the killings were part of that drug conspiracy.

Tartaglione pleaded not guilty to the charges, which were filed in a five-count superseding indictment. The original indictment was sealed. The charges referred to co-conspirators, but did not identify other people allegedly involved.

Dec. 20, 2016: The bodies of those four men were found on property that Tartaglione had rented in Otisville in Orange County. The four men had been missing since April 11, 2016.

March 8, 2017: Gerard Benderoth fatally shot himself when FBI agents pulled him over while driving in Haverstraw. Questions swirled about a possible tie between Benderoth — a 48-year-old power weightlifter, Stony Point resident, retired Haverstraw police officer, and father of four — and Tartaglione.

Tartaglione's lawyer, Bruce Barket, said at the time that Benderoth had surfaced in the case, but it's unclear in what capacity.

June 1, 2017: Joseph Biggs, a Nanuet resident and security guard for the Greenburgh-Graham school district in Hastings-on-Hudson, was arrested in the case. He and Tartaglione were charged in a 17-count superseding indictment, which added firearms and kidnapping charges to the murder and drug conspiracy charges.

September 19, 2017: A brief appearance in White Plains federal court revealed that prosecutors believed Tartaglione was not present when three of the men were killed in April 2016. Prosecutors had said that Tartaglione and Biggs are believed to have lured Martin Luna to Likquid Lounge because he owed money from a drug operation, and that Luna brought the other three men, who were not involved in the narcotics ring.

Martina Luna's death was ruled a homicide, but a specific manner of death was unclear. The other three men were shot, but not in the presence of Tartaglione, according to prosecutors, who believed then that all four men were killed at the bar.

Feb. 11, 2018: Tartaglione was assaulted at the Metropolitan Correctional Center in Manhattan, where he has been held since his arrest, his lawyer said in court documents. Barket said Tartaglione needed reconstructive surgery for a fractured eye-socket bone.

Barket mentioned the attack in a letter to U.S. District Judge Kenneth Karas, in which he asked Karas to help get Tartaglione better accommodations because of poor conditions at MCC.

March 19, 2019: Prosecutors tell Karas that they will seek the death penalty against Tartaglione, a decision that had lingered since his arrest.

July 3, 2019: Correction officers at MCC confiscate an illicit cellphone from Tartaglione's jail cell, according to court records. Prosecutors said Tartaglione claimed that his cellmate had tossed the phone to him as officers approached.

July 24, 2019: WNBC reports that Tartaglione was questioned about how financier and accused child sex trafficker Jeffrey Epstein was found injured at MCC. Epstein was reportedly found semi-conscious on the ground with marks on his neck in his cell, according to WNBC, and Tartaglione denied having anything to do with it when questioned by investigators.

August 10, 2019: Epstein commits suicide in his cell. Tartaglione was no longer his cellmate, but was housed in the same area at the time.

August 20, 2019: Barket requests that Tartaglione be moved out of MCC, citing not only the ongoing physical deterioration of the jail but also implied threats from guards who don't like how outspoken he and the ex-cop are about the conditions and the circumstances of Epstein's death.

NICHOLAS TARTAGLIONE: Ex-cop reportedly questioned about Epstein

CELLPHONE CONFISCATED: Feds say Tartaglione had one in jail cell

DEATH PENALTY: Feds seek capital punishment in Tartaglione case

TARTAGLIONE: Lawyer blasts indecision on death penalty

ASSAULT: Tartaglione attacked in jail, his lawyer says

VIDEO:Nicholas Tartaglione quadruple homicide case video observations revealed

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Twitter: @MattSpillane