Investigator

But it was something else Diane Eidman told investigators about her own husband that they said gave them pause.

Now with Bob's death, police say she was suddenly in line to receive more than $300,000 in life insurance.

Now with Bob's death, police say she was suddenly in line to receive more than $300,000 in life insurance.

Bob's older brother by 21 months. Glenn Eidman grew up as a straight-A student, and he was a frequent target of Bob's verbal barbs.

Bob's older brother by 21 months. Glenn Eidman grew up as a straight-A student, and he was a frequent target of Bob's verbal barbs.

Glenn always believed that Bob was his mother's favorite. Even so, he said he was not prepared for what he says she asked him to do as they attended Bob's funeral.

Glenn always believed that Bob was his mother's favorite. Even so, he said he was not prepared for what he says she asked him to do as they attended Bob's funeral.

But then the Major Case Squad does a deep dive into Bob's email, his phone and computer records. They're searching for any hidden clues. They make a discovery they're eager to know a lot more about, just as Glenn comes in for his interview.

But then the Major Case Squad does a deep dive into Bob's email, his phone and computer records. They're searching for any hidden clues. They make a discovery they're eager to know a lot more about, just as Glenn comes in for his interview.

Turns out this long-married insurance agent was leading a secret double life.

Turns out this long-married insurance agent was leading a secret double life.

When you have a secret, what vulnerability does that give someone like Bob Eidman?

When you have a secret, what vulnerability does that give someone like Bob Eidman?

As investigators continue searching through Bob's phone records, they find something else noteworthy. One phone number keeps popping up, belonging to a man from out of town.

As investigators continue searching through Bob's phone records, they find something else noteworthy. One phone number keeps popping up, belonging to a man from out of town.

What is it like to all of a sudden learn that there's this whole other secret part of his life that you knew nothing about?

What is it like to all of a sudden learn that there's this whole other secret part of his life that you knew nothing about?

We've altered the man's voice.

We've altered the man's voice.

And as a young, untested detective is taking on his very first big murder case, a totally unexpected assist from the cutting edge of forensic science, it's going to take this investigation into surprising territory and bring answers at last to the key question, why was Bob Eidman killed?