FRESNO COUNTY, Calif. (KSEE/KGPE) – The Fresno County Sheriff's Office is asking for the community's help in locating a man they consider armed and dangerous.  Deputies say they are looking for 29-year-old Helan Lopez Sanchez. He is described as 5 feet 10 inches tall, 185 pounds, with brown eyes and black hair and is known to frequent the areas of Mendota and Tranquility in Fresno County. Helan Lopez Sanchez According to deputies, Sanchez has a history of violence and is currently wanted for assault with a deadly weapon. Sheriff's officials add he should be considered "armed and dangerous." Anyone with knowledge of his whereabouts is asked to contact law enforcement immediately at 559-600-3111.