Alexej was stupefied because this was the reality he had to accept. His son actually died in the same way as Richard.
"This is…" Everyone who could see the picture on the ground sucked a cold breath. If a normal person saw this picture, they would think this was karma. The Lexon Group seemed to be involved, so his son paid the retribution.
With the loss of his son, the Empress would surely stop joining hands with him, and she would protect Alea from the Griffith Family. In other words, not only could he lose the Empress' support, but he also betrayed the promise to the Griffith Family's Theodore Griffith.
However, Alexej had a different thought. After all, Yermolayev couldn't kill his son that easily, considering he was protected by bodyguards.
And with how the wounds were similar to Richard's, it was clear that the culprit was the same.
Magic Saint Fist Style.