BOSTON (AP) — A man convicted of killing a Boston police officer and a city employee are among more than two dozen people arrested in sweeps targeting drug and gun crimes.

Federal prosecutors said Thursday that 29 people have been charged with state and federal drug, firearms and counterfeiting crimes.

Among those charged is Terrell Walker, who was convicted of manslaughter in the 1973 killing of Boston police officer John Schroeder. Walker is now charged with unlawful possession of a firearm and other offenses.

It wasn't immediately clear if Walker has an attorney.

Also charged is Gary Webster, a project manager for the Boston Planning & Development Agency and former employee of a city councilor. Prosecutors say Webster sold drugs to someone secretly working with authorities.

Webster has been placed on unpaid administrative leave.