A Ferry-Fillmore District police officer has been suspended and the chief of the district demoted in an investigation over allegations that the officer stole a dog from a Herman Street residence earlier this month, authorities said today.

Officer Kristen W. Russo allegedly went to the dog owner’s home on Herman at 6 p.m. Dec. 3 and demanded the dog from its owner, according to police sources. The owner first filed a complaint with the police department but later went to an area media outlet to complain about the theft and authorities began an investigation.

District Chief Michelle Kubala apparently heard of the incident, prior to the complaint, but took no action to rectify it and was demoted to her civil service rank of lieutenant earlier this week and has been assigned to the Northwest District, police sources said this morning.

Police spokesman Michael J. DeGeorge said the case remains under investigation by the department’s Internal Affairs Division.