At first, law enforcement agencies only used that information to check for stolen cars, or to act on arrest warrants, but now many police forces are storing those images indefinitely. This information could potentially be used to document where you drive, who you associate with, or even how long you were there. Law enforcement is no longer keeping this information only on those found guilty of a crime, they’re storing data on everyone to prove criminal activity at some later date. That’s the reason the ACLU is exposing this surveillance program. They say the government shouldn’t be watching our every move, just in case we commit a crime later.As is the case with the NSA surveillance programs, government officials contend that this supposedly-modest invasion of our privacy is necessary to find criminals and keep us safe.