How many movies have Donna Colabella and Erle Stanley Gardner collaborated on?

They have worked on 28 movies together! Their first movie together was Perry Mason: The Case of the Shooting Star (1986) while their highest rated movie together was Perry Mason: The Case of the Heartbroken Bride (1992). They have not worked together since Perry Mason: The Case of the Jealous Jokester (1995). They are most known for their crime films together.