Whitechapel murders
Police work and criminal prosecutions at the time relied heavily on confessions, witness testimony, and apprehending perpetrators in the act of committing an offence or in the possession of obvious physical evidence that clearly linked them to a crime. Forensic techniques, such as fingerprint analysis, were not in use, and blood typing had not been invented. Policing in London was—and still is—divided between two forces: the Metropolitan Police with jurisdiction over most of the urban area, and the City of London Police with jurisdiction over about a square mile (2.9 km2) of the city centre. The Home Secretary, a senior minister of the British government, controlled the Metropolitan Police, whereas the City Police were responsible to the Corporation of London. Beat constables walked regular, timed routes.