DARIEN — The Drug Enforcement Administration acknowledged two Darien officers for their work in nabbing the dealers responsible for distributing heroin that led to a rash of overdose deaths in Fairfield County.

In early October 2015, the DEA’s Bridgeport office began an investigation into a rash of local heroin overdoses. Four of the overdoses were fatal. Departments from the affected communities, including Stamford, Norwalk, Trumbull and Darien, started an investigation. The DEA coordinated with members from the narcotics units in each department and established a multidepartment task force.

Members from each department gathered intelligence and connected their information, and were able to identify a network of suppliers distributing kilograms of heroin throughout the Fairfield County area.

After three months of monitoring phone calls between the suspects, police arrested 13 people and seized $215,000 in assets, including six firearms, two vehicles, one kilogram of heroin and four kilograms of cocaine.

On Feb. 7, Brian Malagrida of the DEA’s Bridgeport office awarded certificates of appreciation to Detective Sgt. Jeremiah Marron and Officer Michael Cummings for their contributions to the 2015 investigation.