From secret rendezvous, to sex with strangers, it's happening every single day in our public parks, Rescue 4 Undercover investigator Kevin Dietz reported.

Viewers called Rescue 4 Undercover demanding their parks back from the men, women and teens who come there for not so secret sex hookups, often right in front of innocent children playing in the park.

Rescue 4 Undercover responded, putting hidden cameras in the parks callers complained about.

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See Rescue 4 Undercover Love Van Investigation

It didn't take long Rescue 4 Undercover to catch it all on tape -- from couples getting it on in the front seat to people piling out of back seats and adjusting themselves after an afternoon romp.

Rescue 4 Undercover cameras showed that sex isn't just in the city, but it's in suburban parks, too.

Rescue 4 Undercover was not out to embarrass couples casually enjoying each other's company or desperate housewives seeking some physical attention, but when the sex acts are performed in public parks in front of our children, something has to be done.

Families told Rescue 4 Undercover it's getting so out of control, someone has to save the parks from the most blatant offenders.

That's when Rescue 4 Undercover jumped into action.

Rescue 4 Undercover cameras got a close look inside a vehicle they referred to as the love van.

Cameras rolled as a very public romance played out.

A man from Redford arrives early to get the love van ready for action by putting down the hideaway seats in the back.

A woman from Berkeley arrived a few minutes later.

They meet in a Wayne County park for a lunch break, but the two were apparently hungry for love.

They embrace and kiss passionately -- public displays of affection for everyone to see.

When they're ready to swing into high gear and get wild, they head into the back of the mini van.

As they roll around on the floor they have no idea Rescue 4 cameras are rolling, too.

That's when Rescue 4 Undercover came knocking on the van.

Dietz: "We're getting a lot of complaints from citizens about this stuff. They want to know why you're coming to the public parks to do it and why don’t' you just go somewhere else. If we go away, will you go away?"

The couple's public display is outrageous, but it's the story behind the van that will has people talking.

When is the last time you bought a brand new car?

The manufacturer's sticker is still on the window of the van. The man inside the vehicle is a car salesman.

The car dealer is taking out this new van for a test drive with his girlfriend. Would you buy this van?

Dietz: "Are you going to stay out of the parks?"

The salesman and his lady friend dash out of the park, exposed by Rescue 4.

And where does he take the love van? Not to the carwash, but back to the dealership where he parks it in the new car lot for customers to look at.

That's where our Rescue 4 Undercover producer finds the van and takes it for a test drive.

Producer: "Do you know anything about this particular one? It looks like it's been driven a little bit.

Car Dealer: "No. It's brand new. It just came off the truck."

Rescue 4 Undercover knows the van did not come off the truck, but just came back from the park.

A Rescue 4 hidden camera shows the seats in the back are still folded down.

The salesman shows Rescue 4 Undercover's producer how easy it is to put the seats back in the upright position.

Car Dealer: "That's leather now. You know that?"

Producer: "Now how is that for, like, staining and stuff?"

Car Dealer: "No. We Scotchguard them."

Rescue 4 Undercover shines a black light in the van to find a stain on the carpet, in the back where the couple was laying.

Believe it or not, on this day, the 2005 Freestar minivan is still for sale if you want to buy it.

Producer: "It looks somebody was driving it."

Rescue 4 hidden cameras find the salesman who was in the van back at the dealership, but he knows it's just a matter of time.

He can't possibly think he can get away with this with Rescue 4 Undercover on the job.

Dietz: "They don't want people doing this in their public parks."

After being confronted in the park, this car salesman calls it quits, putting in his two week notice, never telling his boss what really happened and leaving the van for sale on the lot.

How would you like it if you ended up buying this car?

Couple: "I'd be very disturbed about that."

Rescue 4 Undercover interviewed a couple that just bought a brand new car.

Kara and Brad said what happened inside the minivan makes them sick.

Brad: "To disrespect someone else's property like that is totally uncalled for."

Rescue 4 took the video to the dealership and the salesman is no longer working for them.

The car is not going to end up in anyone's driveway. Rescue 4 Undercover learned it will be cleaned and given to charity.