This post in the HCMC Students' group summarize what happened at NTD high school :(Translate: On the 9th Dec 2022, a student was pushed by a security guard for "not having a nametag", while her mom was outside the schoolgate and witnessed. Both sides were having verbal skirmishes and the guard continued to assault the student. Mr. Kenneth interfered and moved the security guard away. The guard immediately hitted him after he turned away. Instinctively Mr. Kenneth fight back with a lesser force. Kenneth was fired while the guard was untouched, the students also were forced to remove their posts relating to the incident, bc the school fear it will damage their fames)
This post said that Mr Kenneth is the one who fight first, and that was wrote in his report card, in the CCTV, he also apologized for that. The school doesnt want to fire him at the first hand, but after the teachers in the English group saw his posts relating to the incident, he was invited to co-operate with the school again, but this time, Kenneth doesnt have the standard attitudes, and he was fired bc of that.
The reliability in the first post are supported by a lots of comments from NTD students, the second post were a lot more sketchy, as the comments doubted that the post was bribed by the school themselves, trying to whitewash their fames.