Police Link Gun Found to Hudson Killings

Weapon Was in Weeds a Block From Where Nephew's Body Was Found

In 2007, she hit superstardom with her debut film role in "Dreamgirls," earning a best supporting actress Academy Award for her role as rising singer turned down-and-out single mother Efie White -- a role Hudson said she always wanted to play.

WATCH: Hudson's Family Tragedy

WATCH: Mother's Heart-Breaking Plea

Hudson's Mom, Brother Killed; Boy Missing

The singer also recently announced her engagement to David Otunga, best known for his stint on VH1's reality show "I Love New York."

ABCNews.com's Luchina Fisher, Imaeyen Ibanga and Scott Michels contributed to this report.

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