Published: Mar 18, 2013 12:13 PM EDT

LEE COUNTY, Fla.- A Lee County man faces life behind bars for murdering an Estero grandmother. Over the weekend, 26-year-old Shane Simpkins was found guilty of murdering Mary Ann Zarb in 2011.

It took the jury less than two hours to come back with a verdict. The judge threw out a kidnapping charge against Simpkins, who will be sentenced next month.