A 39-year-old man who ran marijuana-growing operations in North Stonington and Lisbon pleaded guilty in New London Superior Court on Wednesday and was sentenced to 18 months in prison followed by three years of probation.

Christopher Hasbrouck pleaded guilty to possession of marijuana with intent to sell. He entered his plea under the Alford Doctrine, which indicates he does not agree with the state’s version of the case but concedes there is enough evidence to convict him at trial.

Police said Hasbrouck engaged officer Sean Lisee in pursuit on Feb. 18, 2013, after Lisee attempted to stop his vehicle on Long Hill Road for a canceled registration. Hasbrouck fled at high speed in a Cadillac Escalade onto Interstate 95 and drove north at speeds exceeding 95 mph at times, according to a court document. He was stopped by North Stonington Resident Trooper Thomas Fabian after he exited the highway at Exit 92. The officers noticed a strong smell of marijuana in the car and found filters, pumps and fertilizers associated with growing the drug, according to an arrest warrant affidavit.

The police obtained a search warrant for Hasbrouck’s home at 311 Cossaduck Hill Road in North Stonington and said they seized 50 marijuana plants, several pounds of packaged marijuana, several grams of hashish, narcotics pills, drug paraphernalia, cultivation materials and $20,000 in cash.

In July, troopers said they found more plants, a pound of packaged marijuana, several grams of hashish and other cultivation materials when they went to Hasbrouck’s home at 68 Bushnell Road in Lisbon to serve him with an arrest warrant.

As part of his plea agreement with the state, Hasbrouck, who has previous marijuana and narcotics convictions, agreed to forfeit his 2002 Cadillac Escalade, which will be turned over to Groton Town police, and $15,000 in cash.

— Karen Florin