2020 was deadliest year for migrants crossing unlawfully into US via Arizona

Remains of 227 migrants found last year, said Humane Borders, while at least 7,000 have died along US-Mexico border since 1998

When the remains of two undocumented migrants were found in the desert of south-western Arizona last July, one body lay next to an arrow drawn in the sand, pointing north, with the word HELP" written beneath.

The men had perished while attempting to cross into the US from Mexico, according to border patrol. Out of a group of three, one survived and told the federal agents their human smuggler had left the other two behind in the remote wilderness area.