Massachusetts Appeals Court March 23, 2018, 17–P–11 (Commonwealth v. Gibson)

After a jury trial, the defendant was convicted of operating a motor vehicle while under the influence of intoxicating liquor (OUI), third offense.2 On appeal, the defendant argues (1) the judge erroneously denied his motion for mistrial, (2) the prosecutor's closing argument improperly shifted the burden of proof to the defendant, and (3) the prosecutor's closing argument improperly vouched for