MILWAUKEE — Milwaukee police are investigating the disappearance of 25-year-old Jeremy Kopka and are asking anyone with information about his whereabouts to contact authorities. Kopka was last known to be near the 1500 block of West Windlake Avenue on Sept. 6, according to police. His disappearance was reported to the department on Sept. 14 at about 11:30 a.m. Police describe Kopka as 5 feet 9 inches tall and weighing about 140 pounds. He has brown hair and brown eyes. Investigators do not have information about what he was wearing when he went missing. Police said Kopka is not considered a critically missing person at this time. Anyone who may know where he is or have information relevant to the investigation is asked to call the Milwaukee Police Department at 414-935-7222.