El Paso suspect appears to have posted anti-immigrant screed

About 20 minutes before the shooting started at an El Paso Walmart, a rambling screed was posted to an online message board saying the massacre was in response to an "invasion" of Hispanics coming across the southern border.Investigators increasingly believe these are the words of 21-year-old suspect Patrick Crusius, who surrendered shortly after Saturday's rampage , and they are looking closely at the writing as they consider whether to prosecute the slaughter of 20 people and the wounding of 2