My brother vanished on the night of his prom—23 years later, I spotted someone who looked exactly like him 3,000 miles from home.

The other man in that confrontation had not survived the encounter, though Daniel did not know that for certain until much later.

The 17-year-old boy was terrified. Luckily, a family friend, his car mechanic, had found him hiding behind the strip mall an hour later.

The man had told him, urgently and without much explanation, that the safest thing he continue reading …