Town of Tonawanda man found guilty of killing girlfriend in their apartment

TOWN OF TONAWANDA, N.Y. (WIVB) — A Town of Tonawanda man was found guilty of murdering his girlfriend in their apartment more than one year ago.

Prosecutors say John Avent, 50, fatally stabbed Roberta Rybinski, 51, inside the Newell Ave. building sometime between March 3 and March 8, 2016.

When Avent is sentenced on April 21, he could spend up to 25 years to life in prison. provides commenting to allow for constructive discussion on the stories we cover. In order to comment here, you acknowledge you have read and agreed to our Terms of Service. Commenters who violate these terms, including use of vulgar language or racial slurs, will be banned. Please be respectful of the opinions of others. If you see an inappropriate comment, please flag it for our moderators to review. Note: Comments containing links are not allowed.

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