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UPDATE: Gloucester County Man Charged with Homicide

East Greenwich Township


Acting Prosecutor Christine Hoffman and East Greenwich Police Chief Matt Brenner are announcing that Mr. Sean Lannon, as a result of the ongoing GCPO investigation, is now charged as follows.  

Officials said these charges flow from the murder by blunt force trauma of Michael Dabkowski, 66, at his East Greenwich residence on March 10, 2021. 

Officials issued the following additional charges: 




Murder During Commission of a Robbery

Murder During Commission of a Burglary


Possession of a Weapon

Possession of a Weapon for an Unlawful Purpose

Possession of a Blunt Object for Unlawful Purpose

Theft of Motor Vehicle 


As noted in prior releases regarding this investigation, Prosecutor Hoffman extends her heartfelt appreciation to the many partners who participated in and advanced this investigation at a very rapid pace.

This includes the East Greenwich Police Department under Chief Brenner’s leadership, which conducted the initial Wellbeing Check and whose diligence was directly responsible for promptly finding Mr. Dabkowski’s body.  

Chief Brenner, very pleased with the exemplary performance of EGPD members, states, “I could not beprouder of my officers and detectives. Although these are circumstances that this community rarely encounters, their quick and decisive actions underscore their professionalism and dedication to their fellow citizens.

 EGPD personnel worked in close partnership with the Gloucester County Prosecutor’s Office and numerous other agencies to achieve a prompt and very necessary arrest of a dangerous suspect.”

This investigation has been and continues to be a total team effort. The scope of this investigation is made clear by the following list of participating agencies:

East Greenwich, Greenwich, Paulsboro, Monroe, Elk, Franklin, Woodbury, West Deptford, Gloucester Township, Deptford, Pitman, Pennsauken, Harrison Twp., Cherry Hill, Camden County, NJ Transit Police Departments

Philadelphia, Annapolis Md., Grants and Albuquerque, N.M., AMTRAK Police Departments

New Jersey State Police, Real-Time Crime Center South, Delaware State Police, MAGLOCEN

Gloucester County Sheriff’s Department, Gloucester County SWAT, Camden County Sheriff’s Department

NJ Office of the Attorney General, NJ Division of Law, NJ Division of Child Protection and Permanency,

Camden County Prosecutor’s Office

U.S. Attorney’s Office, Marshal’s Service, DEA, FBI, HSI

Gloucester County Administration and Commissioners

Faith-based and Non-Profit organizations ​

This investigation remains active and GCPO Detectives believe there are additional witnesses who can provide crucial information to aid and further this investigation.