My son stopped breathing in the middle of the night?

Has anyone had a false red alert happen? Last night we were woken up by a red alert saying my son had stopped breathing. I am obviously very concerned by this because I don’t see him breathing on the video clip when the red alert occurred. However, the band was a bit low, was wearing a sleep sack and he was in a very deep sleep, because when we ran into his room he was still asleep and not woken up by the alarm. I have no idea if this was a false alarm or not but I have no idea where to go from here…