Federal agents raided Baltimore City Hall and the home of Mayor Catherine Pugh Thursday as the criminal investigation into her financial dealings ramps up.

Pugh, a 69-year-old Democrat, is being investigated for using her political connections to make hundreds of thousands of dollars from sales of her self-published Healthy Holly children’s book series. She was reportedly paid $500,000 for 20,000 copies of the books from the University of Maryland Medical Center in a no-bid deal, all while serving on UMMC’s board. She has since resigned from the board and taken a leave of absence from the mayor’s office.