CHICAGO — The Archdiocese of Chicago reinstated the Rev. Michael Pleger, the firebrand South Side priest known for his advocacy of social justice causes.

Pfleger has been the pastor of St. Sabina Catholic Church, a predominantly African American parish in Chicago’s Auburn Gresham neighborhood, for more than 40 years. He was suspended while placed under investigation for allegations he sexually assaulted a minor 30 years ago.