Acting on a tip, DEA agents in wait for a black Toyota Camry, said to contain oodles of heroin. They spy the Camry and also notice a RAV4 that appears to be driving in tandem with it. So they pull over the RAV4 too. And find two kilograms of heroin. Jackpot! District court: There was no reasonable basis to stop the RAV4, so evidence of the heroin must be suppressed. Sixth Circuit: To the contrary, the DEA agents reasonably suspected that the two cars were working in concert, which was enough to justify stopping both of them.