Rescuers began searching for the four people on Sunday, after an ATV the four were believed to be riding was found near an entrance.
The lawsuit alleges that at least two days before the deadly explosion, the rig's managers received warnings that included a "skull and crossbones graphic"
On Nov. 25, U.S. border agents fired tear gas to disperse a group of migrants near the U.S.-Mexico border crossing separating Tijuana from San Diego.
"I took action...I took her life," Trejo told an investigator, according to charging documents.
In a decade, the non-Hispanic white share of the K-8 population dropped from 56.7 percent to 49.9 percent, the Census bureau says