A Lawrence man has been arrested and arraigned on drug and gun charges in connection with a major heroin and fentanyl trafficking operation, Attorney General Maura Healey announced today. \n\nLowell Police arrested Tommy Pena, age 30, on Wednesday night. He was arraigned in Lawrence District Court on Thursday on the charges of Possession of a Firearm, Improper Storage of a Firearm, Possession of a Firearm During a Felony, Possession of Ammunition, Trafficking Heroin, and Conspiracy to Violate the Drug Laws (one count each).\n\nPena pleaded not guilty to the charges at arraignment and was held on $200,000 cash bail. He is due back in Lawrence District Court for a probable cause hearing on January 8. The charges stem from the execution of a search warrant at Pena\u2019s Lawrence home. \n\nJose Cutoen was also arrested and arraigned in November on 21 separate counts of various drug and gun charges as a result of the execution of the same search warrant. Authorities seized seven guns, three large capacity magazine, ammunition, 14 pounds of marijuana, 400 grams of suspected heroin and $5,000 in cash from the Lawrence home of Cutoen and Pena. \n\nAuthorities allege Cutoen and Pena are part of a major fentanyl trafficking operation that AG Healey\u2019s Enterprise, Major and Cyber Crime Division has been investigating along with the Massachusetts State Police assigned to the AG\u2019s Office, the State Police Commonwealth Interstate Narcotics Reduction Enforcement Team (CINRET), the U.S. Drug Enforcement Administration (DEA), and Homeland Security Investigations, with assistance from the Lowell, Lawrence, Haverhill and Peabody Police Departments. \n\nAuthorities arrested 12 other individuals who are allegedly part of this fentanyl trafficking operation on various drug trafficking charges in late October in a large-scale takedown in Lawrence. As part of that takedown, authorities executed search warrants at multiple locations in Haverhill and Lawrence and seized approximately 600 grams of suspected heroin and fentanyl and $21,000 in cash. \n\nThis investigation is ongoing. These charges are allegations and defendants are presumed innocent until proven guilty. \n\nThe case is being prosecuted by Assistant Attorney General Gina Kwon, Deputy Chief of AG Healey\u2019s Enterprise, Major and Cyber Crimes Division. The case is being investigated by State Police assigned to the AG\u2019s Office, the State Police Commonwealth Interstate Narcotics Reduction Enforcement Team, the U.S. Drug Enforcement Administration, Homeland Security Investigations, and the AG\u2019s Cyber Crime Lab, along with Lowell Police, Haverhill Police, Lawrence Police, and Peabody Police.