BROCKTON, Mass. — A Massachusetts man convicted of human trafficking has been sentenced to more than five years in state prison.The Brockton Enterprise reports that 26-year-old Shakwaan Simpkins was sentenced Thursday, two days after jurors found him guilty of one count of trafficking a person for sexual servitude.Prosecutors say in 2015, Simpkins, of Brockton, was arrested in an undercover sting operation targeting human traffickers after he attempted to recruit an undercover police officer to work for him as a prostitute.