The trackers are slow in their pursuit and finally arrive at the watering hole at dusk. They make camp nearby, and two of the trackers sleep while the third stands watch. Kino decides that he must attempt to attack them before the late moon rises. He strips naked to avoid being seen and sneaks up to striking distance. Just as Kino prepares to attack, Coyotito lets out a cry, waking the sleepers. When one of them fires his rifle in the direction of the cry, Kino makes his move, killing the trackers in a violent fury. In the aftermath, Kino slowly realizes that the rifle shot struck and killed his son in the cave.
Henna is known to be dangerous to people with glucose-6-phosphate dehydrogenase deficiency ( G6PD deficiency ), which is more common in males than females. Infants and children of particular ethnic groups, mainly from the Middle East and North Africa, are especially vulnerable.  Though user accounts cite few other negative effects of natural henna paste, save for occasional allergic reactions, pre-mixed henna body art pastes may have ingredients added to darken stain, or to alter stain color. The health risks involved in pre-mixed paste can be significant. The United States Food and Drug Administration (FDA) does consider these risks to be adulterants and therefore illegal for use on skin.  Some pastes have been noted to include: silver nitrate , carmine , pyrogallol , disperse orange dye, and chromium.  These have been found to cause allergic reactions, chronic inflammatory reactions, or late-onset allergic reactions to hairdressing products and textile dyes.