Following is a rundown of activities that occurred over the weekend in the Tucson Sector. This is only a thumbnail of each incident and an invitation to contact the Tucson Sector Communications Division for more information. Significant Arrests Border Patrol agents from the Casa Grande station arrested an illegal alien Friday who admitted to being a member of the Sureno 13 gang. When his fingerprints were entered into a database, agents discovered he had arrests alleging aggravated assault with a weapon, possession of a firearm, and harassment. The man was held for further processing. Casa Grande station agents arrested an...