Our card this week is Robert L. Christian, the four of spades from Wisconsin.

In the fall of 1977, Robert, who went by Bob, was just weeks into his freshman year at UW Madison.

He was a math whiz with a knack for computers and a really big heart. And at 18 years old,

there was no telling how far he'd go. But no one ever expected to be asking the question,

where did he go? Yet here we are, almost half a century later with that burning question

and just a string of bizarre clues that lead many

to believe an infamous serial killer could be to blame for his disappearance.

I'm On the evening of Friday, September 16th, 1977, 20-year-old Randy Griffith was at his mom's house in

Baraboo, Wisconsin, waiting for his childhood friend Bob Christian to arrive. The pair had planned to spend

the weekend together to kick off the start of deer bow hunting season. Bob was going to come over at

six, eat dinner with the Griffith, stay the night, and then the duo would head out with their

bows early the next morning. But six o'clock came and went with no sign of Bob.

One thing is Bob was always earlier or definitely on time, but he was never late. And when he didn't

arrive by 6.30, we said, this ain't like him. And my mom called his mother and said

that Bob hadn't arrived yet. And his mom said, he didn't leave to about 5.15. Okay, so it's an hour

from their house. So where my mom's house is.

So I'm thinking, okay, 6.15, it could be a few minutes late.

But, you know, and then they didn't arrive still at 9 o'clock.

That was Randy, you just heard.

With Bob now, a full three hours late, Randy's mom called the Christians again.

And this time around, Bob's parents weren't so

quick to brush it off. Bob's youngest sister, Amy, was home when that second call came in, and she

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