DOVER-FOXCROFT — A 54-year-old Maine man has been sentenced to 50 years in prison for beating, strangling and suffocating his older sister.

Michael Toby, who was sentenced today, was convicted in March of killing 70-year-old Rosalie Shedd at her Dover-Foxcroft apartment in 2008. Prosecutors said Toby beat the woman with a piece of wood, strangled her with a vacuum cleaner cord and put a plastic bag over her head.

Toby used an insanity defense during a jury-waived trial, but Piscataquis County Superior Court Justice William Anderson found that he knew right from wrong.