LONDON, Ont. - Waterloo regional police have charged a London, Ont., police officer in an investigation that began about 18 months ago.

Const. Sergio Mendez-Vargas was charged with breach of trust on Thursday and is expected to appear in London court on Feb. 21.

London police Chief John Pare requested the investigation in July 2016.

London police say the 33-year-old officer has been with the force for five years and has been suspended from duty with pay since March 27, 2017.

Under the provisions of the Police Services Act, a chief is not allowed to suspend a member without pay when criminal charges are laid.

Details of the allegations were not released.