Suspect Charged in 2017 Murder of Off-Duty D.C. Police Officer

New details emerge in the cold case of Sgt. Tony Mason Jr., killed in a case of mistaken identity on a Baltimore street.

Dion Thompson, currently in federal prison, has been charged with the murder of D.C. police Sgt. Tony Mason Jr. in Baltimore.
The breakthrough in the case came from a tip, leading to the arrest under a newly established cold case unit.
Investigators believe Mason was mistakenly targeted by Thompson, thinking he was a rival gang member.
Thompson faces multiple charges, including first-degree murder and illegal firearms possession.
The case has brought renewed focus on using advanced technology and collaboration to solve cold cases.