It's getting curiouser and curiouser.
CNN article below says the Secretary and his aides were " ... trying to remain a little subtle," asking the ambulance to have siren and lights off as it approached the Secretary's home.
He was " ... experiencing complications from a December 22 procedure to treat prostate cancer."
But he was not " ... experiencing chest pain or feeling like he was going to pass out. He was awake and oriented."
The rest of the article goes on to describe his medical situation in some detail, as well as mentioning a "review" that will take place of how all this went down.
https://www.cnn.com/2024/01/16/politics/austin-911-audio-walter-reed/index.html