(CNN) -- The death of Springfield, Illinois, Mayor Timothy Davlin has been ruled a suicide, the local coroner's office announced Wednesday.
Davlin died of a self-inflicted gunshot wound to the chest, Sangamon County Coroner Susan Boone's office reported after a Wednesday morning autopsy. The city's mayor pro tem, Frank Kunz, said Springfield was "stunned" by Davlin's sudden death, which is under investigation by the Illinois State Police.
Davlin was found dead in his home Tuesday, the same day he had been ordered by a judge to present an accounting of his cousin's estate. The 53-year-old two-term Democrat had served as executor of that $845,000 estate, and Springfield Catholic Charities had gone to court to collect an unpaid bequest.
Davlin was not seeking a third term as mayor in 2011, and the Internal Revenue Service had filed a lien against his home for nearly $90,000 in back taxes from 2003, 2005 and 2006, according to property records.