The Denton City Council voted Tuesday night to join the lawsuit against SB4, otherwise known as the Sanctuary Cities Bill.
The bill, which was signed by Gov. Greg Abbott in May, lets police ask during routine stops if someone is in the U.S. legally.
Denton Mayor Chris Watts said at tonight's meeting "this is an issue for the courts to decide, because if a legislature overreaches and someone challenges it and the court renders it unconstitutional or pairs it back some, that's our system and I trust that system and I have faith in that system, so that's why I will be supporting this resolution."
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The law also threatens police chiefs and sheriffs across the state with jail if they do not cooperate with federal immigration laws.
Gov. Greg Abbott and other supporters insist the law will help remove dangerous criminals from Texas communities.
Dallas, Austin, San Antonio and Houston have all already joined the lawsuit. The Fort Worth City Council voted back in August to not join the lawsuit.
The Denton City Council voted 6-1 to join the lawsuit with District 3 Councilman Don Duff voting against the proposal.