Phila. Coroner's Records (search, certificate, father, research)

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Hello I'm hoping to glean some information from you experienced researchers. In 1914 my G Grandfather who was a structural worker was killed while working on a job in Philly. I was told by a Great Aunt ( his daughter) that he was electrocuted and on his death certificate it is stated "inquest". The Phila medical examiners office only has records back to 1942. I was told that they have no idea where the old records are stored. Any suggestions on where to go from here? Thanks to all