New Haven Man Sentenced to 21 Years in Federal Prison for Distributing Methamphetamine Pills, Violating Supervised Release

David X. Sullivan, United States Attorney for the District of Connecticut, announced that DONALD OGMAN, also known as “Mainey-O” and ”Manny O,” 44, of New Haven, was sentenced today by U.S. District Judge Vernon D. Oliver in Hartford to 252 months of imprisonment, 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 court documents and statements made in court, Ogman 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.  He pleaded guilty to narcotics offenses and, on March 10, 2015, was sentenced to 188 months of imprisonment and five years of supervised release.  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. 

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

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

Ogman has been detained since his 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. 

Judge Oliver sentenced Ogman to 228 months of imprisonment for the new offenses, and a consecutive 24 months of imprisonment for violating the conditions of his supervised release.

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 (OCDETF) Program.