But he doesn't own the title of shortest tenure as Baltimore's top cop.
The announcement of De Sousa's resignation came after he was charged with three misdemeanor counts of failing to file federal income tax returns by federal prosecutors last week.
De Sousa, the ninth person to hold the job since 2000, served as commissioner longer than Ronald L. Daniel, who served under then-Mayor Martin O'Malley for just 88 days. He took office Jan. 3, 2000, and resigned March 30.
O'Malley had twice expressed his impatience with Daniel's leadership — once for not moving fast enough to fight crime and then for disagreeing with a New York consultant hired by O'Malley.
City Hall sources at the time said Daniel could not work with $2,000-a-day crime consultants O'Malley had hired. Of 87 suggestions for how to reduce crime in Baltimore, Daniel rejected half, City Hall sources said.
Short tenures among Baltimore police commissioners are not uncommon in a city long plagued by violence.
After Mayor Catherine Pugh fired Kevin Davis, De Sousa's predecessor in January, Chuck Wexler told the Sun that the average tenure of a police chief in a major city is three to four years.
"The bigger the city, the shorter the tenure," said Wexler, executive director of the Police Executive Research Forum. "The stakes are higher in a big city."