A truck driver involved in the recent, fatal smuggling attempt pretended to be one of the migrants, Mexican officials say.

45-year-old truck driver Homero Zamorano was found in a nearby field after abandoning a semi truck full of suspected migrants in San Antonio earlier this week, killing 51 people. 

“[Zamorano] was very high on meth when he was arrested nearby and had to be taken to the hospital,” officials said of the incident. In addition to being “very high on meth,” Zamorano has now been accused of trying to pass himself off as one of the surviving migrants while under arrest and during his time in the hospital, as stated in a Mexican Consulate Press Conference. 

No charges have been filed against Zamorano at this time. Reuters reports that two other suspects in the case, Juan Francisco D’Luna-Bilbao and Juan Claudio D’Luna-Mendez, both Mexican citizens, have been charged with possessing firearms while residing in the United States illegally. The two were tracked through the truck’s vehicle registration, which led investigators to an address in San Antonio. Investigators then placed the house under surveillance and arrested each of the men separately as they left the residence.