Aaron Kosminski Whitechapel Murders

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Why was Aaron Kosminski suspected of being the Whitechapel murderer? According to Melville Macnaghten in his 1894 Memoranda one of the three men who was more likely than Thomas Cutbush to have been Jack the Ripper was “Kosminski” who, according to Macnaghten, was “… a Polish Jew, & resident in Whitechapel. This man became insane owing to many years indulgence in solitary vices. He had a great hatred of women, especially of the prostitute class, & had strong homicidal tendencies; he was removed to a lunatic asylum about March 1889…” Kosminski is of particular interest because, in addition to Macnaghten, the two highest ranking officers, with direct responsibility for the Jack the Ripper investigation, also considered him the to be a strong suspect for the Jack the Ripper murders. In 1910 Sir Robert Anderson, Assistant Commissioner throughout the murders, wrote in his memoirs that "…'undiscovered murders’ are rare in London, and the ‘Jack-the-Ripper’ crimes are not in that category... I will merely add that the only person who had ever had a good view of the murderer unhesitatingly identified the suspect the instant he was confronted with him; but he refused to give evidence against him…In saying that he was a Polish Jew I am merely stating a definitely ascertained fact…" Although Anderson didn’t name this suspect, it is apparent that he was referring to Macnaghten’s ‘Kosminski,’ a fact confirmed in 1987 when Chief Inspector Donald Swanson’s copy of Anderson’s memoir was made public. Swanson was the officer tasked with assessing all the information on the Jack the Ripper case, and few people possessed anything like his comprehensive knowledge of the murders. He and Anderson became firm friends and when The Lighter Side of My Official Life was published, Swanson received his own personally inscribed copy. Swanson made penciled annotations to
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