At a special called city council meeting, Mr. Dean submitted his resignation effective immediately.
"This is a day of fear, trepidation and excitement all wrapped into one," he said before turning in his resignation letter.
Mr. Dean, mayor for more than five years, said he intends to run in the July 15 special election for the commission seat vacated by Lee Anderson on Tuesday.
Qualifying for the Harlem mayoral race will be April 28-30. Candidates must be registered voters, a Harlem resident for at least one year and at least 21 years old, City Manager Jean Dove said. The fee is $144.
-- From staff reports