A new generation of technology such as the Beware software being used in Fresno has given local law enforcement officers unprecedented power to peer into the lives of citizens. But the powerful systems also have become flash points for civil libertarians and activists, who say they represent a troubling intrusion on privacy, have been deployed with little public oversight and have potential for abuse or error. This is something that's been building since September 11," said Jennifer Lynch ... at the Electronic Frontier Foundation. "First funding went to the military to develop this technology, and now it has come back to domestic law enforcement. It's the perfect storm of cheaper and easier-to-use technologies and money from state and federal governments to purchase it." Perhaps the most controversial and revealing technology is the threat-scoring software Beware. Fresno is one of the first departments in the nation to test the program. As officers respond to calls, Beware automatically runs the address. The searches return the names of residents and scans them against a range of publicly available data to generate a color-coded threat level for each person or address: green, yellow or red. Exactly how Beware calculates threat scores is something that its maker, Intrado, considers a trade secret, so it is unclear how much weight is given to a misdemeanor, felony or threatening comment on Facebook. The fact that only Intrado - not the police or the public - knows how Beware tallies its scores is disconcerting.