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On the morning of August 30, 2000, Mark Lundy left a series of messages on his wife's phone,

sounding increasingly irritated she wasn't picking up or returning his calls.

When his phone finally did ring, it wasn't her.

Instead, it was a friend informing him police officers were at his house, something horrible had happened.

Join me now, as we take a look into the Lundy family murderers, a case that's captured the attention of New Zealanders for more than 20 years.

You'll hear how nearly everyone was satisfied that a cold hearted ax murderer had been brought to justice until everything they thought they knew turned out to be wrong.

In February 2001, a passenger arrived at Dallas-Fort Worth International Airport all the way from New Zealand.

Inside his luggage was a very unique and very important package.

Containing two small spacks, each about the size of a grain of rice, he believed to be brain tissue.

If he was right, the answer to a brutal double homicide was in his sights.

The passenger was Detective Sargent Ross Grantham of the Palmerston North Police Department on New Zealand's North Island,

and the reasoning just flown 7,500 miles to Dallas, Texas was to meet Dr. Rodney Miller,

the only pathologist in the world, who was convinced he could successfully test the tissue samples and determine their origin.

Everyone else said it couldn't be done.

So with no one else willing to test the samples, you would be up to Miller and Grantham to do just that.

Over the next few days, Grantham lived and worked alongside Dr. Miller, steening as a guest at his home.

The lead detective even acted as an assistant, putting on rubber gloves and participating in Dr. Miller's laboratory tests.

But there was a good reason no one else on the planet was willing to do these tests, because they'd never been done before.

Two swatches of polyester cotton fabric were produced from an evidence bag, cut from an ugly double-x-cell purple and blue polo shirt.

After forensic examiners had noticed two small stains, one on the left sleeve, one near the breast pocket.

...