Daniel James Klein was 4 when he vanished from Minneapolis on November 10, 1951, alongside his brothers David, 6, and Kenneth, 8. The three boys left their home on Colfax Avenue North intending to walk four blocks to Fairview Park and were never seen again.

Early searches focused on the nearby Mississippi River after a tracking dog led searchers to the riverbank and two boys’ caps and their Roman Catholic catechisms were found near the water. No bodies were recovered despite extensive searches, and the drowning theory was later questioned by some investigators and family members who suggested possible abduction. Multiple suspects have been proposed over the decades, but none have been definitively tied to the disappearances.

The Klein family continued seeking answers long after the official investigation ended. Does anyone have memories, documents, or leads about the boys’ last day or the subsequent searches that could help reopen details of this case?