NEWSPHOTOS: 'Lights for Liberty' vigil calls attention to migrant detention centersA woman holds a sign during a "Lights for Liberty" vigil to call attention to the treatment of immigrants in detention centers on Friday, July 12, 2019, in Austin, Texas. [NICK WAGNER/AMERICAN-STATESMAN]Austin American-StatesmanU.S. Rep. Lloyd Doggett, D-Austin, speaks during a "Lights for Liberty" vigil to call attention to the treatment of immigrants in detention centers on Friday, July 12, 2019, in Austin, Texas. [NICK WAGNER/AMERICAN-STATESMAN]Austin American-StatesmanPeople sing "This Little Light of Mine" during a "Lights for Liberty" vigil to call attention to the treatment of immigrants in detention centers on Friday, July 12, 2019, in Austin, Texas. [NICK WAGNER/AMERICAN-STATESMAN]Austin American-StatesmanA woman holds a sign during a "Lights for Liberty" vigil to call attention to the treatment of immigrants in detention centers on Friday, July 12, 2019, in Austin, Texas. [NICK WAGNER/AMERICAN-STATESMAN]Austin American-StatesmanJulieanne Hartnell and Chris Ochoa embrace while participating in a "Lights for Liberty" vigil to call attention to the treatment of immigrants in detention centers on Friday, July 12, 2019, in Austin, Texas. [NICK WAGNER/AMERICAN-STATESMAN]Austin American-StatesmanPeople hold up tea lights during a "Lights for Liberty" vigil to call attention to the treatment of immigrants in detention centers on Friday, July 12, 2019, in Austin, Texas. [NICK WAGNER/AMERICAN-STATESMAN]Austin American-StatesmanJustin Allen holds up a sign during a "Lights for Liberty" vigil to call attention to the treatment of immigrants in detention centers on Friday, July 12, 2019, in Austin, Texas. [NICK WAGNER/AMERICAN-STATESMAN]Austin American-StatesmanA woman participates in a "Lights for Liberty" vigil to call attention to the treatment of immigrants in detention centers on Friday, July 12, 2019, in Austin, Texas. [NICK WAGNER/AMERICAN-STATESMAN]Austin American-StatesmanJulie Reichert, left, and her son, Ben, hold up tea lights during a "Lights for Liberty" vigil to call attention to the treatment of immigrants in detention centers on Friday, July 12, 2019, in Austin, Texas. [NICK WAGNER/AMERICAN-STATESMAN]Austin American-Statesman