A device that attaches to Apple's iPhone and can be used by law enforcement agencies for quick, portable IDs of suspects is raising civil liberty and privacy questions.

The Wall Street Journal reports that authorities in Massachusetts, Arizona and elsewhere are planning to roll out the devices made by BI2 Technologies Inc. of Plymouth, Mass. They can reportedly be used to photograph a person's face, irises and fingerprints for images that can then be used to identify them.

The Journal said that some are questioning whether use of the device in some ways would legally be considered a search that would require a court order...

Coming to a cop near you! Just don't make eye contact with them!