The news of Luo Lan barging into Stronghold 114 and killing Qing Huan on the spot did not spread too widely.
Not only did an official in the stronghold issue a confidentiality order on the incident, but he also placed everyone who knew under house arrest in Qing Huan's official residence, making them sign a confidentiality agreement.
This official actually knew all about the Qing Consortium's situation. Now that he had seen Luo Lan kill Qing Huan without any hesitation, he knew the true purge was starting.
Therefore, there were definitely others Luo Lan had to kill.
If the people Luo Lan wanted to kill fled after hearing about some commotion in Stronghold 114, all of the officials here would probably get into trouble.