A man has been arrested and jailed in connection with the weekend shooting death of a 20-year-old man in Cobb County, authorities said.

Austin Postell, 19, of Hiram, fired into a crowd and killed Rodney Tyreek Koen II at a house party in Powder Springs early Sunday, according to the arrest warrant.

Postell has been charged with felony murder, aggravated assault and possession of a firearm, according to Cobb County jail records. He’s being held without bond.

About 12:40 a.m., Postell fired “after an altercation broke out” that involved Koen, “where multiple subjects started shooting,” according to the warrant.

Koen had multiple gunshot wounds, authorities said, and died from his injuries.

The party, which was in the 4600 block of Hunter Road, was described as a “coming home” gathering for a friend in the military, relatives told Channel 2 Action News.

Koen was working on his GED so he could enlist in the Navy, Channel 2 reported.

In other news:

Customers at a storage facility in Tucker said dozens of units have been broken into over the last few days.

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Ceudy Gutierrez reads a book to her 2-year-old son, Matias, at their home in Buford, GA, on Tuesday, Nov. 18, 2025. Ceudy Gutierrez is struggling to make ends meet for herself and her three young kids following her husband’s ICE arrest earlier this fall. (Miguel Martinez/ AJC)

Credit: Miguel Martinez-Jimenez