and walked around for half an hour do you think in three days you would be able to find me? we would definitely be able to find you. the data is stored on huge computer hard drives for 30 days, then police say erased in line with privacy guidelines. you think this is overly intrusive into new yorkers lives? no. and this is all public visual data. we re not prying into anyone s private domain when we do this. this is what is happening on the street. critics do not agree. new york defense attorney josh draytel handles civil liberties cases. he says the nypd collects too much private information. you think new yorkers should be more aware of how much is being done in the name of security? i think so because it never stops. the history of surveillance never stops with the principle object of the surveillance. one of the reasons why people say well i don t mind, because they re just going after muslims and islamic terrorists because they don t identify with them.