Yes, in Michigan you're allowed to ask for your own blood test to be conducted. You may want to do this if you simply don't trust the police department or you think the additional test will help. Moreover, if the police deny your client’s reasonable request for the independent blood test, the jury will receive an instruction that the police violated the defendant’s statutory right to get an independent test.
The issue with the independent blood test is you don't get to decide if it becomes evidence - for better or worse, higher or lower result it will be part of the evidence. Many defenses revolve around questioning the accuracy of the breath test, and if you have a blood test, that YOU ASKED for confirm those results, you don't have much room to argue a defense based on a faulty machine result.
The issue with the independent blood test is you don't get to decide if it becomes evidence - for better or worse, higher or lower result it will be part of the evidence. Many defenses revolve around questioning the accuracy of the breath test, and if you have a blood test, that YOU ASKED for confirm those results, you don't have much room to argue a defense based on a faulty machine result.