A new report reveals the Obama administration is pressing local police departments to conceal information about powerful surveillance technology they are using to vacuum up cellphone data from entire neighborhoods. The Associated Press reports the administration has taken the unusual step of interfering in routine state public records requests and criminal trials to prevent information about the technology from getting out. The secrecy surrounds equipment like “Stingray” spy devices, which trick cellphones into transmitting a user’s location and identifying information to police.