A 55-year-old Vista man suspected of killing his mother has been arrested, the San Diego County Sheriff’s Office announced Thursday.
Tad Christopher Johnson, 55, was arrested at a home in the 2100 block of Riviera Drive in Vista on Tuesday afternoon after deputies found 80-year-old Linda Johnson of Arizona gravely injured there while investigating a reported assault, according to Lt. Juan Marquez.
Paramedics took the woman to a hospital, where she died the following day, Marquez said. The exact cause of her death is under investigation, as are “the motivation and circumstances of the crime,” Marquez said…