The Justice Department filed a lawsuit Thursday against Boston’s Democratic Mayor Michelle Wu over the city’s so-called sanctuary policy, which limits cooperation with federal immigration efforts.

The lawsuit , which also targets the city’s police department and its commissioner, alleges that Boston’s policy is illegal because “cities cannot obstruct the Federal Government from enforcing immigration laws.”

The Boston Trust Act , signed into law in 2014 and amended in 2019 , prohibits law enforcement officials from making arrests solely based on warrants from Immigration and Customs Enforcement, keeping individuals in custody at the request of ICE — known as a detainer request — and sharing information about a person’s release time with the agency.

“These provisions reflect that Ci

See Full Page