Melissa Lucio's attorneys have filed a complaint against the Texas Department of Criminal Justice.

They say state policies against audible prayer and touching immediately before an execution violate Lucio's First Amendment rights.

RELATED: Lawmakers express support in halting execution of Melissa Lucio  

Last week, a similar case was heard by the U.S. Supreme Court, which found that inmates' rights had been violated.

Lucio is on death row for killing her 2-year-old daughter back in 2007. She has maintained her innocence.

RELATED: Legal team for Melissa Lucio files application for clemency  

Lucio's execution date is scheduled for April 27.