DETROIT — Federal prosecutors opened an investigation Thursday in an effort to force former Detroit Mayor Kwame Kilpatrick to pay restitution to taxpayers amid questions about whether he had started paying $1.7 million debt to the city and Internal Revenue Service. The move comes 18 months after then-President Donald Trump commuted Kilpatrick’s 28-year sentence for orchestrating a racketeering conspiracy out of Detroit City Hall. Kilpatrick’s conduct since being freed has raised questions about his rehabilitation, finances and whether he had started paying restitution stemming from his federal…
