A 68-year-old man accused of fatally stabbing his daughter-in-law was found dead at the Twin Towers jail in downtown Los Angeles in an apparent suicide, sheriff's officials said Friday.

Li Zhu was arrested Tuesday in Arcadia. Police said Zhu lived with family members, including his 41-year-old daughter-in-law, Xiaolin Li, in an apartment complex in the 900 block of Arcadia Avenue.

Police were called to the apartment Tuesday morning and found Li with multiple stab wounds. She was not breathing. She was taken to Huntington Memorial Hospital in Pasadena, where she was pronounced dead.

Witnesses at the scene directed police to Zhu, who had left the building. Investigators tracked him down and arrested him later that morning without incident.

Investigators said the stabbing appeared to have been motivated by an ongoing dispute within the family.

Zhu was found dead about 9:51 p.m. the day after his arrest, sheriff's officials said. Homicide bureau detectives responded to the scene to investigate.

A coroner's representative said preliminary information indicated Zhu was found hanged in his cell.

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Twitter: @sewella

abby.sewell@latimes.com