When Visiting A Border Park
Organ Pipe Cactus National Monument shares the border with Mexico for 32 miles. This is a remote region.
Visitors should be aware that drug smuggling routes pass through the park. If you see any activity which looks illegal, suspicious, or out of place, please do not intervene. Note your location. Call 911 or report it to a ranger as quickly as possible.
Each year hundreds of people travel north through the park seeking to enter the United States. It is possible you could encounter an individual or small group trying to walk through the park with little or no water. Please do not stop, but instead, note your location and immediately call 911 or contact a ranger as soon as possible. Lack of water is a life-threatening emergency in the desert.
http://www.nps.gov/orpi/planyourvisit/boarder-concerns.htm
I guess she did not get this memo.