EDINBURG — Rio Grande Valley Sector (RGV) agents arrested four criminal migrants and four gang members.On May 28, McAllen Border Patrol Station (MCS) agents apprehended Alvaro Ruben Picado, a Nicaraguan national. He was convicted for kidnapping in 2007 and sentenced to eight years confinement and subsequently removed from the U.S.On May 30, Weslaco Border Patrol Station agents processed a Mexican national who is a registered sex offender with a previous conviction for rape.On May 31, Fort Brown Border Patrol Station agents apprehended a Mexican migrant who was previously charged with second degree murder in 2014 in Louisiana. The subject was ...