A man who is dying from positional asphyxiation will not speak at a normal, conversational pace.
He will speak in short, repetitive statements that fade and trail off at the end, in an obvious rhythm matching their short breaths; they are unable to breathe deeply enough to construct a longer sentence.
Typically, they panic and start pleading, their voice cracks and changes pitch, display acute fear and become less coherent over time.
They may make nonsensical statements, begin asking for help from people who are not there, ask for their mother, and so on.
When sudden tranquility follows vigorous resistance, there is an extreme risk of death.
These things emerge consistently during positional asphyxiation, but they are often disregarded or not recognised by police and other workers.
This can happen despite education and training on the matter.
However, the signs are easy to identify once you’ve observed the pattern across multiple incidents in real time and heard it for yourself.
For training and education purposes, this video depicts several instances where men have died in custody after being restrained. Viewers will hopefully notice a pattern emerging in each instance.