GREEN BAY - The search for a person of interest in a Green Bay homicide case is becoming more aggressive.
Police are using electronic billboards to find Terry Shepard.
Investigators believe Shepard shot at Steven Sims inside a Stuart St. home Tuesday night.
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Sims died at a hospital the next day.
Police say the billboard company provides the advertising space for free.
The signs are up along area highways and on both sides of the city.
Police estimate tens of thousands of people will see the wanted message each day.
If you have any information or see Shepard, call Green Bay police at (920) 448-3208.