San Francisco Mayor Ed Lee has requested a federal investigation of the police shooting of a young black man, along with a broader look into the department.

Lee asked for the probe of the Mario Woods shooting in a letter to U.S. Attorney Gen. Loretta Lynch that was made public Monday.

The letter, dated Jan. 21 and released Monday, according to the San Francisco Chronicle, said Lee is "inviting transparency and accountability" in the department.

"We seek answers, not just to the facts of Mr. Woods's case," Lee said, "but also answers about how as a Police Department and a City we can build deeper, stronger trust between law enforcement and the communities they're sworn to protect."

Many, including Woods' family, had urged the mayor to ask for the probe, and Lee was joined in the request by city supervisors London Breed and Malia Cohen.

An after-hours message left with a Department of Justice spokeswoman asking for a response to the letter was not immediately returned.

The furor over the Woods shooting dominated the end of Lee's first term and the start of his second, which began earlier this month. His inaugural speech was interrupted by angry protesters, as were remarks he made on Martin Luther King Jr. Day.