The 19-year-old District man charged in a recent series of hammer attacks was ruled incompetent to stand trial and will be sent to St. Elizabeths Hospital for an evaluation.

 Michael W. Davis will be brought back to court after 60 days to determine if his condition improves with medication or treatment, D.C. Superior Court Judge Robert E. Morin ruled Friday.

Gary Dederichs, 66, a tourist visiting from Denver, was slain in northwest Washington. (AP)

Davis was held for psychiatric evaluation a year ago after his teachers and guardian became fearful of his behavior, according to documents filed in D.C. Superior Court.

The court papers do not indicate whether Davis displayed any violence at the time. According to those papers, Davis suffered from “auditory and visual hallucinations.” Schizophrenia and “borderline intellectual functioning” were diagnosed preliminarily.

Police were investigating a total of five similar attacks, including the fatal beating of Dederichs.