OTTAWA - The Senate's ethics officer has resumed an investigation into allegations that Sen. Don Meredith had a sexual relationship with a teenager.

Lyse Ricard suspended her probe in October so as not to interfere with a police investigation.

But her office says she's now resumed her investigation after being advised that the Ottawa police are no longer pursuing the matter.

Ricard was asked to look into Meredith's conduct last June by Leo Housakos, then Speaker of the Senate, who believed the alleged relationship with a teen, if true, would constitute "conduct unbecoming of a senator" and would require disciplinary sanctions.

She is also conducting a second investigation into allegations of workplace harassment against Meredith.

That investigation was prompted by a workplace assessment by an outside investigator who, according to Senate sources, reported complaints from six former staffers about Meredith's allegedly rude and unprofessional behaviour.