The Ontario Provincial Police have announced a $50,000 reward in the search for Peterborough-area resident Lorraine Roach, who has been missing since May 2013.

Representatives with the Peterborough County OPP detachment announced on Tuesday that the provincial government has offered the reward to anyone who can provide information leading to the arrest and conviction of the person or persons responsible for Roach's disappearance.

Police say they suspect foul play in Roach's disappearance and that their case continues as a criminal investigation.

They are asking anyone who may have information that will lead to the whereabouts of Roach or to an arrest to call police or Crime Stoppers.

"We do believe strongly that someone out there holds a very valuable some piece of information that could lead to solving this missing person investigation," OPP spokesperson Sgt. Peter Leon told reporters Tuesday.

Roach, 58, has been missing since the early morning hours of May 11, 2013. She was last seen leaving the home she shares with her husband George at about 1:30 a.m. that night, a few hours after she had returned home from seeing a movie.

Her minivan was located several kilometres away, but no trace of her was ever found.

In October, officers with the Peterborough County OPP detachment’s crime unit forensic identification services conducted a search on the Roach home but no new clues were revealed.

Roach's daughter Jennifer DeBernardi said Tuesday that despite an intensive search, police have not been able to give her family any answers.

"It's been a hard year and a half not knowing what's happened to her," she said between tears.

"So whoever's out there, please just call somebody, call OPP or Crime Stoppers, just to help us. Because we need your help."

She pleaded with the person or person who might know what happened to her mother to call police with information.

"You shouldn't have this on your conscience and we need some closure."