Where a warrantless GPS search was legal at the time it occurred, the exclusionary rule did not apply.The 7th U.S. Circuit Court of Appeals affirmed a decision by U.S. District Judge Michael M. Mihm, Central District of Illinois.The Normal Police Department began an investigation into Richard Martin’s reported drug trafficking in August 2010. This was based on a confidential informant’s identification of Martin as a past supplier of cocaine and marijuana. Normal police and the FBI coordinated a controlled buy …