Gurmeet Singh holds a photo of his granddaughter, Gurupreet Kaur, who died of heatstroke in Arizona in June 2019. The 6-year-old and her mother had just crossed into the U.S. from Mexico.

Gurmeet Singh holds a photo of his granddaughter, Gurupreet Kaur, who died of heatstroke in Arizona in June 2019. The 6-year-old and her mother had just crossed into the U.S. from Mexico.