Chicago's interim police chief is to retire after only month in the job - stepping down after a series of headline-grabbing crimes, on the same day as the ultra-progressive new mayor takes office but insisting that his decision was made months ago. Eric Carter, the interim superintendent, will retire on May 15 after 30 years on the force. He took over when David Brown resigned after the February 28 mayoral election. Brown turns 63 in September, which is the mandatory CPD retirement age.