New police radars can 'see' inside homes
That device is more useful for firefighters than for cops. Firefighters need to find people inside burning buildings.  Looking for trapped people is one of the more dangerous jobs in firefighting. The fact that it's being sold more to cops than firefighters indicates that cops are getting too much money for tactical gear.The device is a fairly basic Doppler radar, although the sensitivity is impressive.  Someone might want to look up the FCC approval data for it to get the full technical specs.