On July 27, 2012, officers of the Wareham Police Department responded to Speedy Mart on Rte. 28 for a reported burglar alarm activation. Patrol Officers and Detective William deSilva conducted an investigation at the scene, at which time evidence, including forensic samples of blood evidence, were collected.

As a result of the investigation conducted by Detective deSilva and evidentiary items submitted to and analyzed at the Mass. State Police Crime Lab in Boston, a DNA profile match was made, indicating that the blood was that of 22-year-old Matthew Decosta of Wareham, who is currently listed as homeless. After receiving information in July of 2012 regarding the DNA identification match, a warrant was issued by the Wareham Fourth District Court for the arrest of Mr. DeCosta, who was charged with felony B&E in the Nighttime, Larceny from a Building, and Malicious Destruction Over $250. During the incident at Speedy Mart, various areas of the building were damaged, and items were stolen from the store.

Matthew DeCosta was placed under arrest on Tuesday, August 28, 2012 and arraigned at the Wareham Fourth District Court.

Chief Richard Stanley praised the efforts of the responding officers, who were diligent in preserving the crime scene, as well as the investigative efforts of Detective William deSilva. This crime is the first B&E incident to be solved in Wareham utilizing DNA technology where the suspect was completely unknown.