She self-published a children’s book and then used her position to generate hundreds of thousands of dollars of sales:

In her three years as mayor, a seat she often described as her “dream job,” Catherine E. Pugh sought to burnish the image of her adoptive hometown, a city battered by rioting, a soaring murder rate, and a history of corruption at City Hall and in the police department.

Yet, as she was sentenced Thursday to three years in prison after pleading guilty to fraud, tax evasion and conspiracy, Pugh personified the dysfunction that has long permeated Maryland’s largest city and sown distrust among its 600,000 residents.

“This became a very large fraud,” U.S. District Judge Deborah K. Chasanow said before punishing Pugh for using her self-published “Healthy Holly” children’s books to generate more than $800,000 in income while failing to deliver tens of thousands of the books to youngsters.
The fraudulent sales to entities with business before city and state government helped fund straw donations to Pugh’s political campaigns and allowed her to buy and renovate a second home in Baltimore.

2 of the past 4 mayors of Baltimore have been charged with corruption while in office.