DARTMOUTH — Bristol County Sheriff Thomas Hodgson is asking homeland security secretary Alejandro Mayorkas to apologize to the Bristol County Sheriff’s Office staff after a memo from Mayorkas said their treatment of detained illegal immigrants is “unacceptable.” In that May 20 memo, Mayorkas ended the BCSO’s partnership with ICE following state Attorney General Maura Healey’s report on the May 2020 melee at the C. Carlos Carreiro immigration detention center in Dartmouth. “We will not tolerate the mistreatment of individuals in civil immigration detention or substandard conditions of detention,” he wrote. The partnership allowed the BCSO to hold federal immigrations detainees at the facility and to aid in apprehending illegal immigrants.