Cops tried to get cell phone bill with out warrent. Amazing. http://www.npr.org/templates/story/story.php?storyId=4990103&ft=1&f=1003
If it's the same case i read about they were trying to locate the guy for murder and he was still in the area. Never hurts to try
November 4, 2005 · Law-enforcement attempts to monitor cell phone use and other digital information continue. In one recent case, police tried to get a cell phone user's billing information without a warrant. A court said the information would improperly give police the ability to locate the cell phone user. A little vague, don't you think?