Nanuet man, a school guard, charged in the 4 Tartaglione case killings

Christopher J. Eberhart | Rockland/Westchester Journal News

Show Caption Hide Caption Video: Police continue to search Tartaglione properties State police and FBI agents searched properties owned by former Briarcliff police officer Nicholas Tartaglione in Otisville and Crawford, N.Y. Dec. 21, 2106. Frank Becerra Jr./Lohud

A security guard at a Hastings-on-Hudson school is accused of killing four men as part of a drug conspiracy with retired Briarcliff Manor police officer Nicholas Tartaglione.

Joseph Biggs, 55, of Nanuet and Tartaglione allegedly kidnapped and shot to death four men in Orange County last year as part of a drug conspiracy involving the sale of 5 kilograms of cocaine.

Biggs was arrested by FBI agents around 7:45 a.m. Thursday in Hastings-on-Hudson. The Hastings-on-Hudson School District said Biggs didn't work for the district. The U.S. Attorney's Office wouldn't say what school he worked for, but a spokeswoman for The Children's Village in Dobbs Ferry said he was employed there about 10 years ago.

Tartaglione, who was arrested in December and pleaded not guilty to a five-count indictment, is now facing an additional 12 additional firearms and kidnapping charges. He has been in federal custody since his arrest. (Read the indictment below)

"Murders are always frightening, but when allegedly committed by people entrusted with the safety of others, it is all the more disturbing,” US Attorney Joon Kim said in a statement.

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Biggs' lawyer, David Goldstein, said Biggs pleaded not guilty.

"The prosecution will provide the discovery by Monday and I'll review those documents, and it's my understanding that following my review we will continue with our not guilty plea through trial," Goldstein said.

Biggs and Tartaglione planned to sell at least 5 kilograms of cocaine from June 2015 to April 2016, according to the 17-count indictment filed in federal court in White Plains on Thursday.

The duo allegedly lured Martin Luna to a Chester, New York, bar called Likquid Lounge on April 11, 2016, Kim said. He came with three other men — Urbano Santiago, Miguel Luna and Hector Gutierrez.

All four were held captive, shot and killed, the indictment says.

Their bodies were dug up eight months later on an Otisville property where Tartaglione had lived.

Biggs and Tartaglione could face life in prison or the death penalty. They're both due back in federal court on June 7.

READ: Indictment of Joseph Biggs and Nicholas Tartaglione

Twitter: @ChrisEberhart2