On December 19, 2001, a young boy's body floated up in Lint Slough, not far from the coastal town of Newport, Oregon. He seemed to be about 4 years old and wore only his underwear. Three days later, divers found the body of a slightly younger little girl, still in 9 feet of murky water, under the Lint Slough Bridge, still tethered to the bottom by a pillowcase full of rocks tied around her ankle. Divers found a similar weighted pillowcase, which had apparently been tied around the boy's ankle. Also in those waters was a sleeping bag full of rocks. Authorities never released a cause of death for the two children, but said they had not died from trauma. Speculation has it that the two children were weighted down by their own cartoon pillowcases full of rocks, both shoved into the sleeping bag and thrown off the bridge into the slough—while still alive.
http://www.crimelibrary.com/notorious_murders/family/christian_longo/index.html
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The Longo children