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It's the summer of 2010 in Los Angeles. One evening, two friends bump into each other at the supermarket.

Hey, Tucker, long time no see. What's up? Oh, hi, Jake. Not much. You know, sometimes you just need five tens of smoked oysters and some spicy mayo to make it through the night.

What's up with you? Well, actually, I'm supposed to meet someone here in the condom and style.

Not sure where exactly. It's a guy I just connected with on Grindr. Take a look.

Jake hands Tucker his blackberry phone. The Grindr app is the brainchild of L.A. Tech entrepreneur, Joel Simkai, who started the site with $5,000.

It launched the year before and already has a half a million users. It's a free-for-all hookup zone where profiles are completely un-vetted and users describe in graphic terms what they do and don't want in a partner from race to wait.

Tucker hands the phone back. Well, does he have a twin brother? Who knows? You can change your name or photo anytime you want. If you're not getting what you're looking for, you can reinvent yourself on the fly. What you want people to know is up to you.

Little mystery can certainly spice things up. Yeah, and it's location-based. That's the genius part. Wherever you are, it shows the closest 200 guys. You tap on the photos and start texting.

Some reply, some don't, but it's never ending. Sounds addictive. It is. Grindr's pioneering geolocation feature will change the dating app industry. It can bring people together anywhere regardless of a user's sexual orientation.

And in the LGBTQ world, that's a big plus, especially in areas hostile to gays. Grindr has quickly moved to the top of the dating app ladder for the gay, bi, and trans community overtaking sites like manhunt.com and gay.com.

Tucker tosses another can of smoked oysters into his cart and squints at Jake.

So, Jake, where's the mystery man? It should be around here somewhere.

Then Tucker spots a guy walking down the aisle behind Jake. Hey, I think your suitors approaching. I'll be on my way.

Grindr may be spearheading the dating revolution, but soon it will draw innovative competitors.

Who will make dating apps faster and more cutthroat.

Hello, I'm Hannah and I'm Sirete 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 behaviour.

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