Officials in South Dakota have identified 28-year-old Lyle Eagletail and 16-year-old Madison Wallace as the two victims who vanished into the icy Sioux River while trying to save the teen's 6-year-old brother from drowning.
Police say the boy identified as Garrett Wallace of Vermillion was playing under a pedestrian bridge at the park when he slipped into the rapids around 6pm on Thursday evening.
Hearing cries for help witnesses say Eagletail, who was there with his friends and 19-year-old fiancé, ran to help.
Friends said he didn't know either the boy or his sister when he reached into the water, grabbing both their hands.
The six-year-old boy emerged downstream minutes later and was treated by emergency crews.
Sioux Fire Chief Jim Sideras said that it still wasn't clear how he got out.
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