Due to the graphic nature of this killer's crimes,

listener discretion is advised.

This episode includes discussions of murder and assault

that some people may find offensive.

We advise extreme caution for children under 13.

In September of 2010, Bruce MacArthur was hard at work,

digging in the backyard of a client's home.

It wasn't easy.

The stone planters were enormous, and at 58,

MacArthur definitely moved a little slower than he used to.

MacArthur had run his own successful landscaping business

for a number of years now, and had a reputation

for creating beautiful outdoor spaces,

featuring gorgeous succulents and tropical plants.

His wealthy clients talked, and word of mouth

usually brought him steady work.

But MacArthur didn't want anyone to talk about

this particular project.

He didn't even want them to see what he was planting

in the soil.

That's why he was there in the middle of the night.

As he paused to wipe the sweat from his brow,

...