U.S. v. Alexander

In prosecution on drug and firearm charges stemming from traffic stop of defendant, where police officer experienced strong smell of marijuana, and where drugs and firearm were seized from car, prosecutor improperly vouched for credibility of police officer during closing arguments, where prosecutor stated that officer would not violate his oath or break the law, and that officer had no incentive to falsely implicate defendant in charged offense, since said statements referred to facts that were outside of record. However, error was harmless, where undisputed evidence indicated that defendant was alone in car that contained marijuana packets, loaded gun, multiple cell phones and substantial amount of cash.