BOSTON, Sept. 8, 2015—The young man found with fatal stab wounds on Constitution Beach yesterday has been identified as 15-year-old Wilson Martinez of East Boston, Suffolk County District Attorney Daniel F. Conley said.

State Police homicide detectives assigned to Conley’s office are investigating Martinez’ death after his body was discovered yesterday morning. The Suffolk County State Police Detective Unit is assigned because Constitution Beach is State property overseen by the Department of Conservation and Recreation.

Conley said the investigation is very active and urged anyone with information on Martinez’ death to contact detectives at 617-727-8817.

“No piece of information is too small to be helpful,” Conley said. “Every piece of evidence, no matter how peripheral it may seem, is important.”

A man walking near the East Boston Yacht Club spotted Martinez’ body near the waterline at about 8:00 yesterday morning and flagged down a nearby State trooper.  Homicide detectives responded to the scene with the State Police Marine Unit, Dive Team, Crime Scene Services Section, and other State Police assets.

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All defendants are presumed innocent until and unless proven guilty beyond a reasonable doubt.