OMAHA, Neb. (AP) — The sister of a man convicted of killing four Omaha people in August 2013 has pleaded not guilty to assaulting a jail guard.

24-year-old Erica Jenkins quipped “not guilty by reason of insanity” when asked for her plea Thursday.

After a brief conversation with her attorneys, she was allowed to change the plea to not guilty.

The felony assault charge accuses Jenkins of hitting a jail guard on Sunday, blooding the officer’s nose. It’s the fourth time that Jenkins has been charged with assault while in jail. Each count carries a penalty of up to five years in prison.

Jenkins was also ordered to stand trial Monday on two counts of robbery, conspiracy to commit robbery and being a habitual criminal.