Join Tim Mahoney, author of Secret Partners: Big Tom Brown and the Barker Gang as he talks about how the 1930s-era St. Paul police chief Tom Brown became a secret partner of the Barker gang, allowing them to continue to commit crimes as long as they continued to pay off the police. Hear this fascinating story, and stay for a book signing following the program. Free. 7 p.m. 345 W. Kellogg Blvd., St. Paul; 651.259.3000; minnesotahistorycenter.org