A grown man was riding a bicycle at night on a public street. There was no rear reflector and no headlight on the bicycle. These are two very minor violations of the vehicle code. It’s the sort of minor offense that most officers would simply ignore. In this instance it was the probable cause for the stop that lead to a major drug arrest.
The state vehicle code provides hundreds if not thousands of opportunities for police officers to stop vehicles. Not just cars and trucks, but bicycles too count as vehicles in most states. This bike rider was out at 2:30 in the morning. That is an unusual time to be riding a bicycle but is not criminal.
What matters is the stop has to be objectively reasonable. Since the person stopped was committing two crimes, no headlight and no tail reflector, the person can be legally stopped while the officer conducts an investigation into those crimes. If during the stop the officer discovers contraband that can be used as the basis for an arrest. Minor crimes often result in the discovery of major criminals; that’s what the SGT Says.