I think you are wrong about the last Marine being killed on October 20th. My grandson is a Marine and I follow the news closely.
unless I missed one ......
I read the DoD news releases ever day , at least several times a week . Perhaps they do not report some? Suicides ?
Usually there is something about “ incident being investigated “
Please check back . Last I have was LCpl Christopher Grant on Oct. 20 . Chris was with 1/9
God bless them all .
The DOD news releases will give you the info you need if you can get past the home page propaganda.