Sickle cell crisis can be very dramatic. The police might have done little or nothing wrong in this case, and not had a clue as to what was going on.
“Severe pain is the most common of sickle cell disease emergencies (acute sickle cell crises).”
A crisis can have one of four distinctive patterns:
1) Excruciating bone pain.
2) Sudden acute chest pain and coughing of blood.
3) Abdominal crisis. Nausea, vomiting, and diarrhea.
4) Severe joint crisis limiting movement.
At the same time, lots of possibilities for internal organ damage and impairment. CNS problems including strokes. Retinal detachment and bleeding in the eyes. Kidney disease and failure. Priapism (persistent, painful erection) is common in males. Heart attack and liver damage.
With PTSD icing on that cake.
It was partly Mom's fault but the physical exam before sending a kid to Boot Camp probably should be a bit more rigorous. It was known that you don't subject a sickle cell kid to that kind of stress and it was, of course known, that a percentage of Negroes have the trait.