CHICAGO (WLS) -- Cook County Crimestoppers is offering a $10,000 reward to find the suspect or suspects involved in the homicide death of a beloved boat captain at DuSable Harbor.

Nabil Abzal, or "Captain Bill" as he was known, of Plainfield was found dead last month in Lake Michigan, Chicago police said.

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Abzal's friends said he was attacked while his boat was docked.

READ MORE | Boating community honors Captain Bill with vigil after death at DuSable Harbor: 'Died protecting us'

Police have not confirmed what might have led up to the alleged murder, but the owner of a nearby restaurant told ABC7 that they have given police surveillance footage as part of the homicide investigation.

So far, Chicago police say no one has been

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