By RANDAL C. ARCHIBOLD
PHOENIX — The police in this city at the center of the immigration debate will soon ask all people arrested whether they are in the United States legally and will in certain cases report the information to the federal authorities, Mayor Phil Gordon announced on Friday.

People stopped for civil traffic violations like speeding will not be questioned, nor will crime victims or witnesses.

All those arrested on criminal charges like drunken driving and murder will be asked by officers whether they are in the United States legally.

The police may decide to recommend checking by Immigration and Customs Enforcement.

The change includes having the police notify the immigration agency about people who are detained but not arrested who officers have “reasonable basisâ€