FBI joins investigation in rare Hercules homicide

  • In this Sunday, Oct. 7, 2012, photo, Sophie Ko, center, and Diana Ko, daughters of slain Susie Ko, gather with relatives following their mother's death in Hercules, Calif. Neighbors found the body of Susie Ko, 55, on Friday night after her husband called a neighbor to check on her when she had failed to pick him up at Oakland International Airport, police said. Suzie's husband Kelvin Ko and niece Audrey Ko are sitting on the couch at rear. (AP Photo/The Contra Costa Times, Susan Tripp Pollard) NO SALES; NO ARCHIVE; TV OUT; MAGS OUT; MANDATORY CREDIT

SAN FRANCISCO — The FBI has joined the investigation into the killing of a retired schoolteacher in her home in the usually tranquil city of Hercules over the weekend.

Federal forensic investigators and police detectives searched the home of Susie Ko most of the day Monday, said Hercules police spokeswoman Connie Van Putten.

Ko, a mother of four adult children, was found dead on the floor of her home by neighbors who were called by her husband, Kelvin, when she failed to pick him up at Oakland International Airport late Friday.

A preliminary autopsy report showed that Ko, 55, died of stab wounds and blunt force trauma to the head, Van Putten said. No suspects have been identified.

"We did get some items that may be of evidentiary value, but we won't know for sure until they are processed by the county crime lab," Van Putten said.

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