You can stream this episode of Murder, She Wrote on IMDb or read a detailed recap on the Murder, She Wrote Wiki . Season 1, Episode 22: "Murder at the Oasis"
In the Season 1 episode " Murder at the Oasis ," Jessica Fletcher investigates the murder of a tyrannical singer found dead in his secured desert home. She discovers that the local detective investigating the case is actually working for a mobster, and that he used his position to commit the crime. This episode features guest star Joey Bishop and highlights the "locked room" mystery format. [S1E21] Murder at the Oasis