More details if you click through a bit: > she dropped off her seven-year-old son and his five-year-old friend at a park about five blocks from the store... a

More details if you click through a bit: > she dropped off her seven-year-old son and his five-year-old friend at a park about five blocks from the store... a friend was teaching a Tai Chi class at the park and was watching the kids while Sarra went to buy groceries. The friend called her when she saw the kids talking to the police, so it would indeed seem that said friend was indeed keeping an eye on them.