A 41-year-old man who claims he killed his 32-year-old fiancée in self-defense was indicted Wednesday in her Sept. 27 stabbing death in Baton Rouge.

An East Baton Rouge Parish grand jury charged William Lee Jackson with manslaughter in the slaying of Lekeisha Duncan at her home on Courtland Circle, which is off Monterrey Boulevard between South Choctaw Drive and Greenwell Springs Road.

Jackson told officers he killed Duncan after an argument, police have said.

“William was attacked as he came home that night and defended himself,” Jackson’s attorney, Beau Brock, said Wednesday.

Jackson, according to an affidavit of probable cause, changed out of a bloody shirt, washed the knife in the kitchen sink and then threw the knife into the kitchen trash can in an effort to conceal any evidence that might link him to the stabbing.

East Baton Rouge Parish District Attorney Hillar Moore III noted Wednesday that Jackson suffered several stab wounds, none of which was life-threatening.

“Jackson provided a statement in which he claimed to have disarmed Ms. Duncan after which she was stabbed to death,” Moore added.

Manslaughter is punishable by up to 40 years in prison.

Jackson, 117 Thelma Lane, Woodville, Mississippi, is free on bail.

His case has been assigned to state District Judge Mike Erwin.