Dainsanefh tips a CNET report about a number of law enforcement groups who have put forth a proposal to the U.S. Senate to require wireless providers to keep logs of subscriber text messages for a minimum of two years. "As the popularity of text messages has exploded in recent years, so has their use in criminal investigations and civil lawsuits. They have been introduced as evidence in armed robbery, cocaine distribution, and wire fraud prosecutions. In one 2009 case in Michigan, wireless provider SkyTel turned over the contents of 626,638 SMS messages, a figure described by a federal judge as 'staggering.' Chuck DeWitt, a spokesman for the Major Cities Chiefs Police Association, which represents the 63 largest U.S. police forces including New York City, Los Angeles, Miami, and Chicago, said 'all such records should be retained for two years.' Some providers, like Verizon, retain the contents of SMS messages for a brief period of time, while others like T-Mobile do not store them at all. Along with the police association, other law enforcement groups making the request to the Senate include the National District Attorneys' Association, the National Sheriffs' Association, and the Association of State Criminal Investigative Agencies, DeWitt said."