Investigators still need the public's help with information about the killings of Robert Wilson, 64, and his mother, Patricia Wilson, 85, on Aug. 14 at their home at 16058 Old State Road.
To report a tip, call the DeKalb County Sheriff's office at 815-895-2155. Callers can remain anonymous by calling Crime Stoppers at 815-895-3272. Police will protect the identity of callers to Crime Stoppers, who can still receive the reward.
Police said the killings occurred sometime between 7:45 p.m. and midnight on Aug. 14. There were signs of a break-in at the house, but the only thing stolen was Patricia Wilson's white, 2010 Chevrolet Impala.
Any information that someone knows they haven't reported – no matter how small – could help solve the case, police said.