Pomona-based Mexican American artist Jaime Muñoz designed the “ICE Stole Someone Here” signs popping up across the Inland Empire. Muñoz said the butterfly behind bars was a symbol for detained immigrants. (Katerina Portela / De Los) Outside Andrea Galván’s Ontario home, two young boys stop on their scooters to watch their neighbor create signs. Galván, an art consultant and activist, is accompanied in her driveway by a group of volunteers passing stencils and aerosol paints a