A Mercedes and a Volvo were left unlocked. So were a Ford Fusion and Ford Explorer.
Thieves took advantage of the situation, breaking into 13 Tega Cay vehicles and making off with loot worth thousands of dollars.
That's not all.
That same night, someone also stole a pickup truck.
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In every case but one, the vehicles were not locked.
"A lot of these crimes were crimes of opportunity," said Capt. Dave Nelson of the Tega Cay Police Department. "Most of the vehicles were not secured."
Crimes of opportunity have been numerous the past year, and that has authorities scratching their heads.
"Our focus is always for the safety of the citizens. We do everything we can to protect the citizens in this community," Nelson said. "They can help us to help them by simply locking their vehicles and taking the valuables out of their vehicles. In a nutshell, don't make it easy on the criminal."
Police say someone entered 11 unlocked vehicles and made off with $2,810 worth of electronics, hats and other possessions from the night of July 23 into the early morning hours of July 24.
Reports show $50 was taken from the center console of an unlocked Honda Pilot. Someone also broke a window on a Honda Civic and made off with a purse. That report of that break-in is the only one that doesn't note that the vehicle was unlocked.
A 2007 Ford F-150 extended cab pickup truck was stolen - along with an extra set of keys to the vehicle in the center console, police say.
Another report says a woman left a purple pocketbook on her rear seat. Someone broke the passenger rear window of her vehicle to snatch the purse.
From a van, someone stole a pink Talbot's purse as well as a GPS unit and satellite radio. Stolen from other vehicles were another GPS, a $200 pocketbook, an iPod and about three hats. In another instance, someone made off with a laptop valued at $900 that was left in the driver's side rear floor board, and the door was unlocked.
Fixing the problem is simple, Nelson said.
"Lock your vehicles," he said," Lock your houses. Don't leave valuables sitting out where people can see them."
That's the message the police department has offered at least two other times since 2009. Between March 13, 2009, and Nov. 2, 2009, police investigated 10 burglaries in which property was stolen from open garages and homes, 37 vehicles were broken into, and in more than 10 of those cases, SUVs, vans, cars and trucks were left unlocked.
In a December police report, more than $3,000 worth of gear was stolen from an open garage.
"We need to be vigilant making sure houses and vehicles are secured," Lt. Buddy Spence said.
To help fix the problem, he said, authorities have stepped up with their awareness initiative.
"We're in this together," Spence said. "It's the police and the community. We need to help each other out, making sure things don't get broken into."
Combating break-ins can be as simple as parking vehicles under or near exterior lighting and/or motion sensors, Spence said.
"It kind of startles the criminal," Spence said of light triggered by motion sensors.
Nelson said: "If the vehicles are in the garage, keep the garage doors down and secured."
Awareness also is key.
"If you see anything suspicious in your neighborhood, please call us," Spence said. "No matter whether that's a suspicious person or suspicious vehicle."