BALTIMORE COUNTY, MD — The Baltimore County Council voted unanimously Thursday afternoon on its new county executive. The decision came two weeks after Baltimore County Executive Kevin Kamenetz suffered a fatal cardiac arrest, months before his term was to end in December.

Donald I. Mohler II, who had been Kamenetz's chief of staff since 2010, will run the county government for the duration of the term, the council decided in a 7-0 vote.

Mohler has extensive knowledge of the inner workings of Baltimore County government. Since 2010, he served under Kamenetz as chief of staff; before that, he held the role of acting chief of staff and was also the communications director under County Executive Jim Smith.

Now Mohler will be the 13th person to hold the position of Baltimore County executive.

"I am truly humbled," said Mohler, whose career began as a social studies teacher in Baltimore County. He went on to become a principal at Sparrows Point Middle and Catonsville High, then superintendent of the northeast area of Baltimore County Public Schools.

"This wasn't supposed to happen," Mohler said, adding: "My friend and County Executive Kevin Kamenetz should be finishing his second term in office."

Kamenetz died on May 10, 2018. He was 60 years old and passed suddenly from a heart attack.

He had been running the government and campaigning for the Democratic nomination in the upcoming gubernatorial election when he became ill in the middle of the night, collapsed while seeking medical treatment near his Owings Mills home and never regained consciousness, officials said.

Eleven days later, a Baltimore County law enforcement officer was killed in an encounter with a burglary suspect. Officer Amy Caprio, 29, was the first female officer to die in the line of duty in the Baltimore County Police Department's 144-year history, officials reported.

"Baltimore County has been through a lot over the last few weeks, including the tragic death of a police officer and the sudden loss of our County Executive. This is a time for everyone — county employees and communities — to come together and heal," Mohler said.

"Baltimore County is strong. As Jill Kamenetz so bravely said at her husband's funeral service: 'We will be okay,'" Mohler said, recounting what the widow said to her two sons at the funeral service.

"County government will continue to provide the services and public safety that our residents deserve," Mohler said. "I am committed to making that happen."

Mohler has a doctorate in education from Nova Southeastern University; a master's in education from Loyola University; and a master's degree in liberal arts and a bachelor of arts from Western Maryland College.