Sheriff believes boy became lost , probably died of heat stroke . The sheriff says the boy's mother called 911 and reported her son missing at about 11 a.m. on Monday. Police tracked down family through phone number on belt buckle . U.S. has been dealing with increasing numbers of children crossing border .
Sheriff believes boy became lost , probably died of heat stroke . Shirtless , decomposed body was found two weeks ago . Police tracked down family through phone number on belt buckle . U.S. has been dealing with increasing numbers of children crossing border .