Harold Rashad Dabney III was arrested Sunday on two counts of capital murder in the death of Dr. Julie Schnuelle, 59, a veterinarian and mother whose body was found in a dog park on Saturday.

They were among nearly 500 workers apprehended at a construction site for a South Korean battery maker, officials said. The episode prompted diplomatic concern in Seoul.

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© Liam James Doyle for The New York Times

The shooting was reported at Annunciation Catholic Church, which operates a school.

The shooting was reported at Annunciation Catholic Church, which operates a school.