'Poison On The Streets': Nassau Man Indicted After Selling, Possessing Deadly Fentanyl, Heroin, Cocaine: DA

WESTBURY, NY — A Westbury man has been indicted after selling and possessing deadly narcotics and explosive substances, Nassau County District Attorney Anne Donnelly said Thursday.

Anthony Gianatiempo, 34 was charged in a 32-count indictment after selling narcotics, including fentanyl, heroin, and cocaine, as well as possessing more controlled substances, narcotics, and explosives in his home, the DA said.

According to the DA, a search warrant executed at his home led to investigators recovering a compound of nitazene, which is a potent synthetic opioid.

Gianatiempo was arraigned before Judge Caryn Fink on a grand jury indictment; charges include 11 counts of third-degree criminal possession of a controlled substance (a B felony); four counts of fifth-degree criminal possession of a controlled substance (a D felony); three counts of third-degree criminal sale of a controlled substance (a B felony); fifth-degree criminal sale of a controlled substance (a D felony); nine counts of first-degree criminal possession of a weapon (a B violent felony); one count of first-degree criminal possession of a forged instrument (a C felony); one count of third-degree criminal possession of a forged instrument (an A misdemeanor); and violations of Labor Law 453 storing explosives and Labor Law 458 possessing explosives without a license, the DA said.

Gianatiempo pleaded not guilty and was remanded, the DA said.

According to the DA, he is due back in court on Jan. 16, 2026. If Gianatiempo is convicted, he faces up to 25 years in prison, the DA said.

“Anthony Gianatiempo was allegedly selling poison on the streets of Westbury, dangerous compounds of drugs including fentanyl, heroin, and xylazine that are extremely addictive and deadly,” the DA said. “A search of the defendant’s home in partnership with the Drug Enforcement Administration and Nassau County police recovered enough fentanyl to kill tens of thousands of people, and quantities of a synthetic opioid from the class of substances called nitazene, which can be significantly more potent than morphine and fentanyl and has already contributed to overdose deaths across the country.”

She continued by discussing the significance of finding nitazene: "This search marked the first time law enforcement has recovered and identified this particular nitazene in Nassau County," the DA said. “But under New York State law, the compound we seized is not a scheduled drug, and unbelievably, not illegal to possess. This should serve as a wake-up call. We must act now to address the loopholes in drug laws that are consistently handcuffing prosecutors from taking action, before we are facing yet another preventable escalation in the opioid epidemic that we continue to fight on Long Island and lose more innocent lives."

Gianatiempo was arrested on Aug. 5 in Hicksville by the Nassau County Police Department, the DA said.

DA Donnelly said that Giantiempo is accused of leaving his home in Westbury on an electric bicycle to sell various narcotics in Cantiague Park on June 18.

He is accused of selling a package containing a small clear plastic bag of a green powdery substance, that was later confirmed to contain heroin, cocaine, and other cutting agents, one clear plastic bag containing a white and gray powdery substance determined to be fentanyl, ketamine, and heroin, and one clear plastic bag containing a white powdery substance, later confirmed to be cocaine, as well as several white tablets containing alprazolam, all in exchange for $820, the DA said.

Xylazine, which is also known as "tranq," was present in the white and gray powdery substance that tested positive for fentanyl, and xylazine is a dangerous veterinary tranquilizer, the DA said.

According to the DA, a search warrant was executed at Giantiempo's residence on Aug. 5 by NCDA, the NCPD, and the DEA.

The DA said they recovered the following:

• 63 grams of heroin
• 39 grams of fentanyl
• 69 grams of methamphetamine
• Cocaine
• Ketamine
• Brown cardboard tubes with fuses wrapped in blue and black tape, and a bottle wrapped in black electrical tape with a fuse found in the defendant’s basement bedroom
• Smokeless powder attached to the defendant’s bedroom door; and
• Counterfeit U.S. currency

The narcotics were found throughout the basement, in Gianatiempo’s room, and in the workstation area outside of his bedroom door in the basement, the DA said.

In a black handbag on the floor near Giantiempo's bedroom, 15 grams of N-Pyrrolidino Isotonitazene were found, the DA said. This is a nitazene compound that is a dangerous and powerful synthetic opioid, the DA said.

The DA said that under NYS' Public Health Law, N-Pyrrolidino Isotonitazene is not listed in the Schedule I through IV, and so it cannot be charged unless it is found mixed with another already scheduled substance.