Well, I mean, I described to you some of the chemicals that, you know, I have had in the past.

You know, strontium nitrate and potassium nitrate and some other things.

So as far as making some type of explosive device, did you make one?

No.

Ever?

Never.

Never made an explosive device.

No.

I'm Scott Weinberger, investigative journalist and former deputy sheriff.

I'm Anasiga Nikolazi, former New York City homicide prosecutor and host of investigation discoveries true conviction.

And this is Anatomy of murder.

When it comes to homicides, an investigator can learn a lot about a killer's intentions by the type of weapon chosen to commit the crime.

A gun, for instance, demonstrates a clear intent to kill.

Poison, premeditation, and bare hands, well, that's often a sign of unadulterated rage. But the more unorthodox methods of murder,

they can test detectives and prosecutors alike as they try to decipher motives and analyze evidence that they may not have had a lot of experience with. And in those situations, local law enforcement

might just call on experts that have the experience

and the resources to solve even the most perplexing and disturbing crimes.

And I'm talking about the feds.

My name is Anna Martin Salick, and I'm a former federal prosecutor.

I began my career in Washington, D.C. at Maine Justice with the National Security Division

and then transferred out to the U.S. Attorney's Office in Los Angeles, where I prosecuted

and investigated national security matters from counterterrorism and espionage to export enforcement and cyber matters.

...