Domestic abuse shelters across the country say phone G-P-S systems are making it harder to keep victims safe. Stalkers are now using newer technologies like Twitter, Gowalla, Four Square and other location services to track every move. By law, cell phones are required to have tracking technology to help emergency crews find callers. Those G-P-S systems have rescued lost drivers, helped police find kidnap victims and even allows parents to keep tabs on their kids. But as many shelters are now finding, it's just as easy for an abusive stalker to activate that same tracking. Keye's katherine stolp found out one Austin area shelter is changing how they do business to make sure the people it helps are protected.