Matthew Lange, 37, late of Oswego

The reward for information leading to the arrest of the person or people involved in the January shooting death of an Oswego man has risen by $45,000.

A private group’s donations led to the increase, in hopes that the murder of Matthew Lange, 37, will be quickly solved.

Lange was shot to death on Jan. 27 while he sat in the parking lot of a Naperville middle school.

According to Aurora police, Lange, a professor at Lewis University, arrived at Scullen Middle School, 2815 Mistflower Lane, around 7 p.m. to pick up his son who was attending Polish classes.

While he was waiting in his parked car, a silver 2013 Hyundai Elantra, Lange was shot and killed by an unknown person or people.

Naperville Police are looking for any witnesses to the shooting and/or information about Matthew Lange or his vehicle on the day of or the days prior to the homicide that may assist with the investigation.

Lange’s murder was Naperville’s first in three years.

Police said the donor responsible for the $45,000 donation wants to remain anonymous. Naperville Crime Stoppers is also offering a $5,000 reward bringing the total to $50,000.

Anyone with information about the homicide is asked to please contact the Naperville Police Department at (630) 305-5453 or (630) 420-6006.

— Donor ups reward for tips on Oswego man’s murder —