OAKLAND — Police Chief Anne Kirkpatrick announced her new command staff on Tuesday, naming John Lois as new assistant chief.

Lois, most recently a deputy chief and previously the head of homicide, will replace Assistant Chief David Downing, who retires in July.

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Reward rises for West Oakland fatal shooting information Downing along with City Administrator Sabrina Landreth led the department for about seven months after Sean Whent resigned and two other acting chiefs were forced out in June amid a sexual misconduct scandal involving officers and the teenage daughter of a police dispatcher.

Lois conducted the administrative investigation into the allegations, which led to four officers being criminally charged.

Darren Allison and Leronne Armstrong were promoted to deputy chief, where they’ll join Danielle Outlaw and Oliver Cunningham at that rank. Allison has served as the acting deputy chief in the bureau of field operations. Armstrong, a West Oakland native, was a captain in the same division.

Promoted to captain were: James J. Bassett, a lieutenant in the robbery division and vice president of the police union; Roland Holmgren, an acting captain in the criminal investigations division and former head of the homicide unit; Nishant Joshi, an acting captain in East Oakland and SWAT commander who has worked undercover and narcotics, and Sekou Millington, who worked undercover and more recently had served as a commander in the training division before moving to patrol.

“I have now solidified my command structure, given clear direction to move the department forward in order to meet our goals and expectations of the community we serve,” said Kirkpatrick, who was sworn in as chief in February. “We will work together to make this city safer.”

The promotions are effective July 1.