The system, which attaches to an iPhone and weighs 12.5 ounces, is already paying off for Florida law enforcement. Since 2004, deputies in the Pinellas County, Fla. sheriff’s office have nabbed 700 people. In Brockton, Mass., the MORIS iris scans quickly link suspects’ prior criminal history.

Forget guns, or CB radios, or even in-car computer systems. In the next year, the iPhone could become the most important crime-fighting tool a cop has at his disposal. Just as the iPhone has reshaped what we expect from smartphones, it’s now set to overhaul law enforcement. Criminals beware!

Everyone beware. Not just criminals. Every last one of us ought to beware.