An attorney who wrote a book about Internet dating was arrested Wednesday for investigation of killing his girlfriend's daughter 20 years ago so the woman could gain custody of her granddaughter, authorities said.

Eric Fagan, 74, was arrested at his home in Chula Vista and was being held without bail on suspicion of murder and attempted murder, according to a San Bernardino County Sheriff's Department statement.

Fagan is accused of shooting Cathy Paternoster, then 32, and wounding Carl Fuerst, then 41, outside their Spring Valley Lake home in 1989.

It was not immediately clear what led authorities to start reinvestigating the case last year after nearly two decades

Messages left at the Sheriff's Department seeking further comment were not immediately returned. A message left at Fagan's law office was not immediately returned.