Attorney General Eric Holder waded deeper into the controversy over the George Zimmerman case and verdict on Tuesday, suggesting a national review of “stand-your-ground” laws during a speech before the annual NAACP convention in Orlando.

The NAACP is at the forefront of the effort to pressure the Justice Department to bring federal civil rights charges against Zimmerman. Holder confirmed on Monday that his department is reviewing that possibility, citing his personal concerns about the case.

He went a step further on Tuesday, weighing in for the first time on controversial state-level laws on self-defense.