Coroner Says Death Self=Inflected - Fort Plain - Montgomery County coroner John Maginnis reported yesterday that 29 year-old David Croce of Fort Plain died of a self-inflicted gunshot wound to the head. Croce's body was found Wednesday morning in a wooded area behind his mobile home on Sand Hill, Montgomery County District Attorney Howard Aison identified the body as Croce's yesterday afternoon He said Croce had been missing since Feb 12. A news release from Aison's office yesterday said the county Sheriff's department and the State-Police began an investigation during Croce's disappearance regarding an alleged grand larceny by extortion against Croce's father, Joseph Croce. The release said that alleged gambling violations concerning individuals in other counties also were being investigated. Maginnis said Croce apparently shot himself with a shotgun sometime before Saturday. Bloodhounds reportedly found the body at about 11 a.m. Wednesday about 200 yards from his home off Route SS in the Town of Minden. Sheriffs deputies said Croce't jeep was stolen from his home on January 30th and was found burned on Oldick Road the next day. They said a stereo system valued at about $2,000 was also reported stolen but never recovered. Aison could not be reached for further comment last night. A county Sheriff's Department spokesman referred questions about the case to State Police. State Police at Fonda said they had been involved in the investigation but that they still had not received a copy of Aison's release. They referred questions back to the Sheriff's Department. Croce was a manager at the Grand Union Supermarket in Fort Plain.