A deputy editor of major publisher Kodansha Ltd. who has been arrested on suspicion of killing his 38-year-old wife last August may have disguised the murder to make it look like a suicide, investigative sources said Wednesday.

The suspect, 41-year-old Pak Jung-hyun, who was arrested Tuesday, has denied committing murder but has made inconsistent statements, the sources said.

He initially told police that his wife, Kanako, had fallen from the stairs at their home in Tokyo's Bunkyo Ward on Aug. 9. At around 2:45 a.m. that day, Pak called an ambulance saying he had found his wife collapsed.