A patron on board a Daly City bound train, reported a suspect, described as a Black male in his 40's, wearing a gray hooded sweatshirt and unknown colored sweatpants, who appeared to be intoxicated. The train was held at the Daly City Station where an officer located the suspect. The officer determined the suspect was too intoxicated to care for himself and placed him under arrest. The suspect was subsequently booked into the SF County Jail for public intoxication. A sergeant approved the arrest.