Multiple agencies are investigating the deaths of a man, his wife and their pre-teen son. This week, Texas Rangers, San Marcos Police and Guadalupe County Sheriff's deputies are investigating after Richard Logan was found dead from a possible self inflicted gunshot wound outside a San Marcos business where he was not employed. After further investigation, officers went to advise Logan's family of his death at his home on Evening Light Drive in Sugar Land yesterday. When there was no answer, officers eventually found the bodies of Logan's wife Diana Lynn and their 11-year-old son Aaron both dead from gunshot wounds inside the home. Investigators in Guadalupe County and in Sugar Land are still working to determine whether the three deaths are linked.