A Tasmanian woman who accused her stepmother of smothering her father with a pillow had a "clear motive" for the "scurrilous allegation", a coroner has found.
In his record of investigation, coroner Rob Webster found the 76-year-old man died of natural causes and wrote that it was "regrettable scarce resources had to be diverted" to "discount what can only be described as a scurrilous allegation".
