Milwaukee County Sheriff David Clarke has been no stranger to controversy.

For example, he was linked to Russia a few months ago after announcing that he was joining the Department of Homeland Security. These links were never confirmed, but Clarke did find himself in hot water over the death of a baby in one of the prisons he was responsible for.

As all of these things began coming to light, Clarke withdrew from the DHS post.

Now, according to CBS News, Clarke is again resigning, this time from his current post.

As of today, he is no longer Milwaukee County sheriff according to Milwaukee County Clerk George L. Christenson. Clarke has served as Milwaukee County’s sheriff since 2002.

Christenson said that Clarke’s resignation letter didn’t provide any reason for leaving his post.

“As far as his rationale,” Christenson told The Washington Post, “I don’t believe I can comment on that … I was not given any advance notice of this, as you can imagine my phone has been ringing off the hook.”

In clarifying his resignation, Clarke remained vague, releasing a statement that said he resigned "to pursue other opportunities" and that he will have "news about my next steps in the very near future."

Along with his possible Russian ties, Clarke is known for his firm support of President Trump.

Besides the death of the baby after an imprisoned pregnant woman was forced to deliver without medical aid, Clarke has been criticized for the death of 38-year-old Terrill Thomas, who was deprived of water as punishment at a county jail. Dehydration killed him.

Clarke was not present at the jail during this events, but the fact that he was in charge of the prison had many calling for his resignation last year.

Beyond this controversy, Clarke was accused earlier this year of plagiarizing his master's thesis on homeland security.

Clarke has been a prominent spokesperson for the Republican party, and was one of the few people of color to speak at last year’s Republican National Convention.

A gun rights advocate, he has likened Black Lives Matter to a form of “anarchy” and has said the group has a "hateful ideology.”

Of those that protest with the movement Clarke has said, "Stop trying to fix the police, fix the ghetto."