Attorney General Dana Nessel has joined a group of attorneys general from around the country in asking Congress to pass a law that would stop federal immigration agents from wearing masks and not identifying themselves during enforcement actions.

Michigan’s attorney general is co-leading a letter to Congress asking it to pass a law to keep Immigration and Customs Enforcement officers from hiding their identity while in the field.ICE officers have received scrutiny in recent months for wearing plainclothes and masks and allegedly not identifying themselves as law enforcement during raids.