A 17-year-old Lawrence boy accused of killing his grandmother last December pleaded not guilty on Wednesday to two new felony charges.

The boy, Jaered Long, was arrested in late December after police found his 67-year-old grandmother, Deborah Bretthauer, dead in her apartment with “obvious traumatic injuries.” Long, who lived in the apartment with his grandmother, was 16 at the time. He faces a single count of first-degree murder in juvenile court and has pleaded not guilty to the charge. Prosecutors have requested that he be tried as an adult.

Now Long faces two felony counts of battery against a law enforcement officer for separate incidents. He is accused of battering juvenile detention center employees on May 12 and June 9.

Douglas County District Court Judge James George accepted Long’s not-guilty pleas Wednesday and scheduled him to be back in court on Aug. 3 at 1 p.m., when a date will be selected for a trial.

Court proceedings regarding the murder charge itself, including whether Long will be tried as an adult, have been stayed pending the results of a competency evaluation by Bert Nash Community Mental Health Center.