The life-or-death penalty decision for a trucker convicted in the nation's deadliest smuggling run went to a jury in Houston on Monday.
Deliberations are expected Tuesday on punishment for Tyrone Williams.
A jury last month convicted Williams on 58 counts of conspiracy, harboring and transporting immigrants.
During closing arguments Monday, a prosecutor showed graphic photos of 19 illegal immigrants who died in the 2003 smuggling run that ended near Victoria.
Defense attorney Craig Washington again pleaded for leniency before the case went to the jury.
Washington reminded jurors that Williams gave water to the more than 70 immigrants crammed into the trailer before he abandoned the truck near Victoria.
Jurors must decide whether Williams deserves execution or up to life in prison.