Once a McLean County sheriff’s deputy gave Joshua Thomas a verbal warning for an obstructed windshield and said he was free to go, the officer did not have “reasonable suspicion” to further detain him so a drug-sniffing dog could search his car, an appellate panel held.Thomas was charged in January 2017 with felony marijuana trafficking and marijuana possession with the intent to deliver after a drug-sniffing dog alerted officers to more than 5 pounds of marijuana in Thomas’ SUV during a traffic …