I mean, that would be like a secret service sniper shooting JFK when Oswald missed, or something. Surely is is reasonable to believe that the risk of a secrete service assassination increases during a assassination attempt. But, there is not really anything that would indicate that.

During the 1WW the death rate of officers was about twice that of privates for a sample.

https://www.sciencedirect.com/science/article/pii/S1570677X2...

I believe that there is a risk of opportunity murder when bullets are flying. Using the confusion as cover. But, as I said, only speculative.