New Haven Man, 44, Guilty Of Meth Dealing, Supervised Release​ Violation, Gets 21 Year Prison Term: Feds

NEW HAVEN, CT — Donald Ogman, 44, of New Haven, was sentenced in U.S. District Court to 252 months in prison, followed by eight years of supervised release, for methamphetamine and cocaine distribution offenses and for violating the conditions of his supervised release that followed a prior federal conviction, according to David X. Sullivan, US Attorney for Connecticut.

According to court documents and statements made in court, Ogman, also known as “Mainey-O” and ”Manny O,” has been a leader of the Grape Street Crips (GSC), a violent New Haven gang.

In 2012, the FBI arrested Ogman for offenses related to his role in GSC, including drug trafficking. Sullivan said. He pleaded guilty to narcotics offenses and, on March 10, 2015, was sentenced to 188 months of imprisonment and five years of supervised release, according to the US Attorney. In August 2022, a federal judge granted Ogman’s motion for compassionate release, reduced Ogman’s sentence to time served, and he was released from prison, the federal prosecutor said.

Ogman resumed his drug trafficking activity while on federal supervised release, distributing multicolored pills containing methamphetamine marketed as ecstasy and crack cocaine in and around New Haven, Sullivan said. The investigation included surveillance, trash pulls, and controlled purchases of methamphetamine pills and crack cocaine from Ogman from November 2023 through April 2024, the US Attorney noted.

Ogman was arrested May 9, 2024 and on that date, searches of his person and residence revealed additional quantities of methamphetamine, as well as crack cocaine, and a loaded firearm was also located at a stash location that was searched on the same date, Sullivan said.

Ogman has been detained since his 2024 arrest.

On April 16, 2025, he pleaded guilty to one count of possession with intent to distribute, and distribution of, methamphetamine; three counts of possession with intent to distribute, and distribution of, 50 grams or more of methamphetamine; and one count of possession with intent to distribute 50 grams or more of methamphetamine and a quantity of cocaine, , per Sullivan and court records.

Ogman was sentenced to 228 months in prison for the new offenses, and a consecutive 24 months of imprisonment for violating the conditions of his supervised release, Sullivan said.

This matter was investigated by the DEA New Haven District Office (NHDO) Task Force, the Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF), the New Haven Police Department and the Hamden Police Department. The NHDO Task Force includes members from the DEA, U.S. Marshals Service, Internal Revenue Service – Criminal Investigation Division, Connecticut State Police and the New Haven, Waterbury, East Haven, Branford, West Haven, Ansonia, Meriden, Naugatuck, and Shelton police departments. The case was prosecuted by Assistant U.S. Attorneys Stephanie T. Levick and Nathan J. Guevremont through the Organized Crime Drug Enforcement Task Forces Program.