DALLAS -- Beginning on Saturday, helping Dallas police fight crime may be as simple as stopping by the nearest convenience store and picking up a free bumper sticker.

A group called "SaferDallas.com" is hoping to raise $4 million, adding that it hopes the 100,000 free bumper stickers being distributed this weekend will drive people to the Web site -- and then get them to contribute money to help make Dallas safer.

"It shows you what equipment we're trying to get for the police department that we haven't already gotten," said Charlie Terrell of SaferDallas.com. "You can help with $25, $50, whatever you want to do."

The bumper stickers were already showing up on Dallas police cars, NBC 5 News reported on Friday. "Every little bit helps, and we need it," said Sgt. Mike Magiera of the Dallas Police Department. "Now, with the start of summer, things getting busy again, it's time for that extra citizen involvement."

In less than two years, Safer Dallas has already raised more than $16 million for the Dallas Police Department, providing the money to buy everything from dashboard cameras to assault rifles.

"The major thing was the cameras that are now in the police cars," Terrell said. "Now, they've got the most modern system in America. Cages for the police cars, lots of technical equipment."