$5-18$ A defendant, Antoine Jones, was under sus$-$ picion of trafficking narcotics. To investigate the de$-$ fendant, plaintiff government agents installed a GPS tracking device on the undercarriage of a vehicle reg$-$ istered to the defendant's wife while it was parked in a public parking lot. For the next $28$ days the govern$-$ ment used this device to track the vehicle's move$-$ ments. In court, the defendant sought a motion to