WOODSTOCK – Three out of four McHenry teens have now pleaded guilty to having a role in the February 2011 armed robbery of a Burger King.

Matthew S. Avonts, 19, pleaded guilty on Monday to theft over $500, a Class 3 felony, as part of a plea deal accepted by McHenry County Judge Sharon Prather. He was sentenced to 140 days in jail.

Day-for-day credit applies, and he was also given credit for a week already served.

Remaining charges, including a misdemeanor case involving possession of marijuana, were dropped.

Avonts also must serve two years of probation, which includes drug screens and drug treatment as recommended, and pay a $1,500 fine plus court costs. Restitution is still to be determined.

Of the four police said were involved in the robbery, charges only remain pending against Marco A. Delgadillo, 19, who also had a scheduled court appearance on Monday. His next court date is July 9.

In March, Kyle D. Melton, 19, pleaded guilty to theft under $500, a misdemeanor. He was sentenced to 180 days in jail and two years of probation.

The following month, Patrick J. Casagrande, 18, pleaded guilty to a misdemeanor charge of theft under $300 and was sentenced to 120 days in jail and two years of probation.

Police have said that while Casagrande stayed in the car, Avonts, Delgadillo, Melton approached two Burger King employees who were taking out trash in the back of the restaurant at 2180 N. Richmond Road, after it was closed.

The trio overpowered the two employees, and Delgadillo battered one of the workers and stayed outside, police said.

Avonts and Melton, wearing black clothing with hoods and bandannas over their faces, allegedly went inside with a fake gun and allegedly demanded money.