A New Haven man, Donald Ogman, also known as “Mainey-O” and “Manny O,” was sentenced to 21 years in federal prison for distributing methamphetamine and violating the terms of his supervised release. The sentence was handed down by U.S. District Judge Vernon D. Oliver in Hartford.
According to court documents and statements made during the proceedings, Ogman has been identified as a leader of the Grape Street Crips, a gang based in New Haven. In 2012, he was arrested by the FBI on charges related to drug trafficking and other offenses connected to his role in the gang. He pleaded guilty to narcotics offenses and was sentenced in March 2015 to over 15 years in prison with five years of supervised release.
In August 2022, a federal judge granted Ogman’s motion for compassionate release, allowing him to leave prison early after serving part of his sentence. However, while under federal supervision, Ogman resumed drug trafficking activities. Authorities said he distributed multi-colored pills containing methamphetamine marketed as ecstasy and sold crack cocaine around New Haven between November 2023 and April 2024.
The investigation into Ogman’s activities included surveillance operations, trash pulls, and controlled purchases of drugs from him. On May 9, 2024, law enforcement arrested Ogman. Searches conducted at that time found additional quantities of methamphetamine and crack cocaine on his person and at his residence. Investigators also discovered a loaded firearm at another location associated with him.
Ogman has remained detained since his arrest. On April 16, 2025, he pleaded guilty to several counts related to possession with intent to distribute methamphetamine and cocaine.
Judge Oliver imposed a sentence of 228 months for the new drug offenses and an additional consecutive term of 24 months for violating conditions of supervised release.
The case was investigated by multiple agencies including the DEA New Haven District Office Task Force—which is comprised of members from various local police departments along with federal agencies such as the U.S. Marshals Service and Internal Revenue Service—as well as the Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF), New Haven Police Department, and Hamden Police Department.
Assistant U.S. Attorneys Stephanie T. Levick and Nathan J. Guevremont prosecuted the case through the Organized Crime Drug Enforcement Task Forces Program.
“David X. Sullivan, United States Attorney for the District of Connecticut,” announced these developments.
