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On May 19, 1921, a man claiming to be the plumber appeared at the door of the summer's family home in San Francisco, California. He told the summer's eldest son Charles Jr. that there was a leaky gas pipe that needed to be fixed.

Charles immediately ushered him inside and showed him the steps to the seller.

As the plumber descended the stairs, he found Charles's 12-year-old sister Mary playing with her dolls.

Suddenly, Charles heard a scream come from the seller.

Racing downstairs, he discovered Mary fighting off the man, kicking and hitting him with all her might.

The so-called plumber had attacked her and attempted to wrestle her to the ground.

Charles pulled the man off Mary and tried holding him down, but the attacker broke free and ran from the house.

Charles chased the man and was able to knock him down several times, but the man escaped after he punched Charles.

The perpetrator was eventually caught two hours later. Dechevilled and bloody, he was taken to jail and booked on assault charges.

The man was no plumber. He was a robber. He was a murderer.

In addition, he was a necrophiliac. He earned many different nicknames, including Gorillomann and the Dark Strangler.

But his real name was Earl Leonard Nelson. And Mary Summers would soon learn how lucky she was that her name was not added to his long list of murder victims.

Hello, I'm Hannah. And I'm SeruT. And we are the hosts of a Red Handed, a weekly true crime podcast.

Every week on Red Handed, we get stuck into the most talked about cases. From the Idaho student killings, the Delphi murders and our recent rundown of the Murdoch saga.

Last year, we also started a second weekly show, Short Hand, which is just an excuse for us to talk about anything we find interesting because it's our show and we can do what we like.

We've covered the death of Princess Diana, an unholy Quran written in Saddam Hussein's blood, the gruesome history of European witch hunting, and the very uncomfortable phenomenon of genetic sexual attraction.

Whatever the case, we want to know what pushes people to the extremes of human behavior.

Like, can someone give consent to be cannibalized? What drives a child to kill? And what's the psychology of a terrorist?

Listen to Red Handed wherever you get your podcasts and access our bonus Short Hand episodes exclusively on Amazon Music, or by subscribing to Wondry Plus in Apple Podcasts or the Wondry app.

From Wondry and Tree Fort, I'm Candice DeLong, and this is the second season of Killer Sighty.

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