There may or may not have been a coroner's report. If it was an obvious suicide with a note, there probably wouldn't have been an investigation.
You can contact the Texas University-Kingsville, www.tsl.texas.gov/arc/local/sanpatricio.html
and ask if they have coroner's reports.
Also if it was an obvious suicide, there may only be one newspaper article/obituary. Successful Searching!