After being declared mentally competent, a 17-year-old Lawrence boy accused of killing his grandmother will now face previously suspended court proceedings, including a determination of whether he should be tried as an adult.

The boy, Jaered Long, was arrested in late December 2015 after police found Deborah Bretthauer, his 67-year-old grandmother, dead in her apartment with “obvious traumatic injuries.” Long was 16 at the time. Both he and Bretthauer lived in the apartment at 1200 George Court.

Lawrence school district spokeswoman Julie Boyle said at the time that Long was not a student at either of the district’s high schools.

Long faces a single count of first-degree murder in juvenile court. He has pleaded not guilty to the charge.

Requests for the arrest affidavit, a sworn document filed by police detailing the reasons for an arrest, have been denied by Douglas County District Court.

In March, prosecutors filed a motion to try Long as an adult. If he were found guilty of the charge in juvenile court Long could face a maximum sentence of 60 months in prison, or to the age of 22. If the motion to prosecute Long as an adult is granted and he is found guilty, he could face more than 40 years in prison.

In June, however, Douglas County District Court Judge Kay Huff ordered Long to undergo a competency evaluation by Bert Nash Community Mental Health Center. Huff suspended all other activity in the case pending results of that evaluation.

Cheryl Wright-Kunard, assistant to the Douglas County district attorney, said Long was recently declared competent and that the hearings to determine whether he will be tried as an adult are now set for Sept. 21-23.

Since Long’s arrest, two new felony charges have been filed against him.

Long is accused of battering a juvenile detention center employee on May 12 and June 9. He now faces two felony counts of battery against a law enforcement officer.

Long is scheduled to appear in court on Aug. 3, where trial dates will be set for the two new felony charges filed against him.