On October 4, 2018, officers watching a couple in Ecatepec, Mexico, saw what appeared to be an ordinary domestic scene.
Juan Carlos Hernández and Patricia Martínez were walking through the Jardines de Morelos neighborhood while pushing a baby stroller.
They had four children, sold clothing and household goods, and were known to transport bags through the streets as part of their work collecting and reselling discarded materials. To their neighbors, the stroller attracted little attention.
