Parents, 3 Daughters Slain; Son Suspected

Three high school girls and their parents were found dead Saturday morning at their home in eastern Iowa, and the couple's son was arrested in Illinois and is considered a suspect, officials said.

The victims were found shot at about 4 a.m. near Bonaparte, according to the Van Buren County Sheriff's Office. It was not immediately clear what prompted the slayings.

Shawn Bentler, 22, was arrested Saturday in Quincy, Ill., on an unrelated charge of possession of drug paraphernalia, sheriff's officials said.