In case you are curious about this particular drug, Wikipedia has this to say:
Methamphetamine is a potent central nervous system stimulant which affects neurochemical mechanisms responsible for regulating heart rate, body temperature, blood pressure, appetite, attention, mood and responses associated with alertness or alarm conditions. The acute effects of the drug closely resemble the physiological and psychological effects of an epinephrine-provoked fight-or-flight response, including increased heart rate and blood pressure, vasoconstriction (constriction of the arterial walls), bronchodilation, and hyperglycemia (increased blood sugar). Users experience an increase in focus, increased mental alertness, and the elimination of fatigue, as well as a decrease in appetite.
Apparently Quest was loitering as he was walking in New York's Central Park in the early hours of the morning when the park was officially closed. A search is standard procedure in such situations.
Although Quest will not be going to jail over this incident we can expect CNN competitors to try to highlight this news in an effort to detract from the news company's reputation.