Metropolitan Police Department of the District of Columbia formed DC Board of Commissioners, established by Congress to govern the entire District. That year as well, Thomas P. Morgan was named to replace Richards, who had resigned, as Major and Superintendent. Although a police fund had been established during the MPD's first year to assist those officers injured in the line of duty, Morgan would add to this by establishing a retirement fund for older officers who could no longer perform their duties. On July 2, 1881, the MPD took part in investigating the assassination of President James A. Garfield. The assassin, Charles J. Guiteau, approached Garfield at the
Charles J. Guiteau storage by the museum. Parts of Guiteau's brain remain on display in a jar at the Mütter Museum in Philadelphia. Dr. Allan McLane Hamilton said in 1881 that he believed that Guiteau was sane when he assassinated Garfield. An autopsy of Guiteau's brain revealed that his dura mater was abnormally thick, suggesting he may have had neurosyphillis, a disease which causes mental instability; he could have contracted the disease from a prostitute. George Paulson, formerly the chair of neurology at Ohio State University, disputed the neurosyphillis diagnosis, arguing that Guiteau suffered from both schizophrenia and "grandiose narcissism". In 2014, the