Coroners, medical examiners, and forensic pathologists are different professions. These include sheriffs, constables, coroners and jailers, (though generally not deputies). He also appointed the Sheriff, coroners and other local officers including an escheator. They are assisted by coroners liaison officers and a medical officer. Other officers included the sheriff, the coroners, the Chamberlain and the chancellor. An autopsy was completed by the British Columbia Coroners Service on July 15. The Homicide Act 1957 and Coroners and Justice Act 2009 are relevant acts. Henson examined urine samples handed over from LA County Coroners Office. A preliminary investigation by British Columbia Coroners Service showed that Todd's death was a suicide. Of the nine that coroners had finished investigating, two were caused directly by mephedrone. It changed the law on coroners and criminal justice in England and Wales. Some coroners are elected, and others appointed. This is no longer so; there are now no "ex officio" coroners. Northern Ireland has three coroners, who oversee the province as a whole. There are 98 coroners in England and Wales, covering 109 local authority areas.