barway edwin collins , 10 , went missing from his crystal , minnesota apartment complex march 18 after school .
on saturday , searchers from boy scout troop found a body ten feet from mississippi river 's edge which was identified as barway .
crystal police chief said electronic evidence shows boy 's father pierre collins , 33 , was in area where body was found at time he disappeared .
hennepin county medical examiner said the cause and manner of barway 's death are still being investigated .