CHICAGO (CBS) -- Chicago police have announced the reward for the Rogers Park killer is now at $150,000.

At a news conference, Chicago Police Superintendent Eddie Johnson said it is the largest reward ever raised for a Chicago homicide suspect.

In late September, a 73-year-old man was gunned down while walking his dog in the Rogers Park neighborhood. The next day, a 24-year-old man was also shot to death in the same area.

Police believe one man, possibly a resident of Rogers Park, is responsible for both murders. CPD released surveillance video show the the alleged suspect, dressed in black, walking down a neighborhood street.

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