Melissa Leo has signed on for the indie drama Betty Ann Waters, joining Hilary Swank, Minnie Driver and Sam Rockwell.

According to Variety, production started this week in Ann Arbor, Mich., on the pic, produced by Sidney Kimmel Entertainment and Omega Entertainment.

Tony Goldwyn directs from a script rewritten by Richard LaGravenese from Pamela Gray's original screenplay. Andy Karsch, Andrew Sugarman and Goldwyn are producing.

Betty Ann Waters centers on an unemployed single mother who saw her brother begin serving a life sentence in 1983 for murder and robbery. Convinced that he was innocent, she earned a law degree and challenged the conviction with DNA evidence, resulting in her brother being freed in 2001.

Swank's playing the title character while Leo portrays the only woman officer at a local police station who's trying to pin the murder on him.