The prosecution has announced that it will seek the death penalty against a Salvadoran illegal immigrant who is accused of murdering four people in Nevada, including an elderly couple.Wilber Ernesto Martinez Guzman, 20, faces a trial in Reno after authorities say he shot dead the couple inside their home in that city, and two women in their homes south of Carson City, during a streak of 10-day crimes in January.The case has caught the attention of President Donald Trump, who says he demonstrates the need to build the wall...