Murder charge sought for death in heat exhaustion case involving immigrants in truck in Ariz.

An Arizona sheriff's office says it will ask for murder charges against two Phoenix residents after a man with heat exhaustion died after being found in a truck with other immigrants.

Pinal County Sheriff's spokesman Tim Gaffney says the office was notified early Wednesday that the victim, a man from Mexico, had died at a hospital. The victim's identity is being withheld pending notification of his family.

Gaffney says the sheriff's office will request a felony murder charge be filed against the driver, 25-year-old Nathan Lamb, and his passenger, 25-year-old Elizabeth Kay, both of Phoenix.

According to the sheriff's office, the man who died was among eight heat exhaustion victims found Sunday in the back of a truck parked at an Interstate 10 gas station northwest of Tucson.