Investigator

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?

Two blocks behind me, Bob Eidman was found robbed and murdered. Diane found out on the site that her husband had been murdered. Yes, she did.

Two blocks behind me, Bob Eidman was found robbed and murdered. Diane found out on the site that her husband had been murdered. Yes, she did.

Friends and family are mourning the loss of Bob Eidman, gunned down in his office in a small strip mall in St. Charles, Missouri.

Friends and family are mourning the loss of Bob Eidman, gunned down in his office in a small strip mall in St. Charles, Missouri.

Now Bob Eidman was dead, and nothing made sense. It was a little before 11 a.m. on June 8th when a mail carrier discovered Bob's lifeless body on the floor of his office.

Now Bob Eidman was dead, and nothing made sense. It was a little before 11 a.m. on June 8th when a mail carrier discovered Bob's lifeless body on the floor of his office.

The investigation into Bob Eidman's murder is all hands on deck.

The investigation into Bob Eidman's murder is all hands on deck.

Bob's wife Diane said he always carried his wallet in his back pocket. Police are desperate for leads, so they're going to try something unconventional. They cut the back pockets out of Eidman's pants to send for something they call touch DNA testing.

Bob's wife Diane said he always carried his wallet in his back pocket. Police are desperate for leads, so they're going to try something unconventional. They cut the back pockets out of Eidman's pants to send for something they call touch DNA testing.

It's a newer technology and it's a long shot. Police meanwhile canvassed the neighborhood where the crime occurred. They're knocking on doors. They're looking for every clue they can find.

It's a newer technology and it's a long shot. Police meanwhile canvassed the neighborhood where the crime occurred. They're knocking on doors. They're looking for every clue they can find.

A white car passing by twice. But the video is grainy.

A white car passing by twice. But the video is grainy.

With lead after lead coming up empty and the clock ticking on that major case squad, Diane Eidman. She remains a subject of, well, we'll call it curiosity. She was, after all, the person closest to Bob.

With lead after lead coming up empty and the clock ticking on that major case squad, Diane Eidman. She remains a subject of, well, we'll call it curiosity. She was, after all, the person closest to Bob.

Tough questions need to be asked about the state of the Eidmans' marriage.

Tough questions need to be asked about the state of the Eidmans' marriage.

Diane insisted the marriage was fine. But when investigators seize Bob's computers to be analyzed, they make a shocking discovery. Bob's been visiting gay websites online. He's looking for massages and sexual relations.