Milwaukee County Courts/family

MILWAUKEE (CBS 58) -- The man authorities believe is responsible for shooting and killing a Milwaukee alderman's nephew, has been arrested in Oklahoma.

Sixteen-year-old Marquis Champion was shot and killed Oct. 20, inside a home near 79th and Hampton in Milwaukee. Investigators say he and his sister were sitting in a kitchen when a man came in and started shooting.

According to Milwaukee police, that man was 37-year-old Martell Haire -- also known as "Gotti." See Also MPD searching for man charged in triple shooting that killed 16-year-old

Three people were injured in the shooting, including Champion who did not survive.

A $25,000 reward was announced by Milwaukee Crime Stoppers to help solve the case, and the story was featured in an exclusive CBS 5

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