Kalamazoo man sentenced for falsifying records on breathalyzer maintenance David John will serve 9 months in jail By: Zac Harmon and last updated 2020-12-17 14:36:03-05 KALAMAZOO, Mich. â A contracted technician for Michigan State Police will spend 9 months behind bars after he was found guilty of filing false reports about certifying one breathalyzer multiple times. David John was sentenced to 36 months probation, with the first 9 to be served at the Kalamazoo County Jail. The 59-year-old was a technician with Intoximeters, Inc, a company contracted by State Police to maintain the 203 DataMaster DMTs, known as breathalyzers, across the state. Those technicians are required to physically visit each department that has a breathalyzer to run diagnostics, calibrations, and make any needed repairs.