The FBI in El Paso says a suspect is in federal custody in a case of social media threats made against Walmart. Agents arrested Alex Barron Friday night after getting tipped off by someone on Thursday. Barron was identified as the owner of social media accounts where several threatening posts appeared along with an image of a gun. The posts said hashtag-WatchOutWalmartImComing and hashtag-DropLikeFlys. An @FBIElPaso tweet by Special Agent In Charge Luis Quesada on Saturday says the agency does not tolerate anyone who threatens to do harm to others.