Susan Spencer

Whether or not they can undermine Preston, the defense has one more card to play.

A new witness. Do you appreciate the fact that this is, in the defense's eyes, an absolute bombshell information?

A new witness. Do you appreciate the fact that this is, in the defense's eyes, an absolute bombshell information?

A new witness. Do you appreciate the fact that this is, in the defense's eyes, an absolute bombshell information?

Will his testimony save the Colonel? Next, on 48 Hours Investigates.

Will his testimony save the Colonel? Next, on 48 Hours Investigates.

Will his testimony save the Colonel? Next, on 48 Hours Investigates.

After just 90 days preparing their case, Colonel Marachek and his team of attorneys have their backs against the wall.

After just 90 days preparing their case, Colonel Marachek and his team of attorneys have their backs against the wall.

After just 90 days preparing their case, Colonel Marachek and his team of attorneys have their backs against the wall.

The expert who did their mannequin test is out of the country, and an apparently fed-up judge has denied motions for a delay. That's it.

The expert who did their mannequin test is out of the country, and an apparently fed-up judge has denied motions for a delay. That's it.

The expert who did their mannequin test is out of the country, and an apparently fed-up judge has denied motions for a delay. That's it.

But on trial day, he marches off to battle, head held high.

But on trial day, he marches off to battle, head held high.

But on trial day, he marches off to battle, head held high.

Russ Preston is here too, also on a mission.

Russ Preston is here too, also on a mission.

Russ Preston is here too, also on a mission.

Marachek's one-time Army buddy is here to tell the jury how Marachek once boasted he would never be caught. All right, gentlemen.