A Thomas Worthington High School senior faces charges and possible expulsion for allegedly stealing thousands of dollars worth of items from the school, using a set of keys he may have lifted from custodians.

Nicholas Wolf, 18, of 7687 Deer Creek Drive, on the Far North Side, was arrested Oct. 7 outside of Evening Street Elementary School after police had been called to the school by an alarm at 3:19 a.m.

Also arrested were two 17-year-olds, also Thomas Worthington students, and Jerred Lengl, 21, of 5032 Derrer Road.

Both Wolf and Lengl were charged with breaking and entering.

Police found several items, including computers and projectors, on the ground near the door of the school and arrested Lengl following a short foot chase. The others were apprehended as the came out of a west side door, according to Worthington detective Emily Mowry.

Entry had been made by pushing a door open, she said.

When officers found on Wolf a set of keys on what looked like a school ring -- some of the keys were marked for certain school offices -- they knew they may have discovered the missing link to several thefts from Thomas Worthington and from Evening Street School.

A search of Wolf's home turned up a few of the computers and other equipment stolen during a July break-in at Evening Street, when $15,000 worth of property was stolen. Not all of it has been recovered, Mowry said.

Twenty-five more keys were also found, along with several items that have turned up missing from Thomas Worthington beginning last summer.

Some of the items, such as a sports radar gun and pieces of sports equipment, had not even been reported missing from the school, Mowry said.

She believes Wolf got the keys during an in-school mentoring program that paired him with custodians. She said she is not sure how long he had the keys.

Lengl was probably not involved in the earlier thefts, she said, but the juveniles and Wolf will probably face charges for both of the Evening Street break-ins and one at the high school.

She is preparing a grand jury indictment.

Wolf and the juveniles also face out-of-school suspensions and expulsion hearings, said district spokesperson Vicki Gnezda.