The death of a 23-year-old British woman visiting her father on vacation in the United States has been ruled a homicide, Fox News Digital has confirmed.Lucy Harrison, from Cheshire County, England, was found at her father's house in Prosper, Texas, Jan. 10, the Cheshire Constabulary said in a release.According to an autopsy report from the Collin County Medical Examiner, obtained by Fox News Digital, Harrison died from a gunshot wound to the chest. The autopsy found she had been "shot by another person."No details about how Harrison was shot were included and there was nothing noted about a criminal investigation