Something bad happened. A pony was slain, by a fool. He never once questioned his loyalty aloud, only in his troubled mind. The aftermath of that death caused him to escape the righteous fury of the royal guards, taking refuge near a lake on the edge of Equestrian territory.
There he sits and ponders his actions and wonders what should become of him. Whilst attempting to come to terms with what had happened, he is found and confronted by Princess Celestia.
He expected a reckoning for his disloyalty, but he got something else entirely. Maybe this is the right choice.
I think you should add suicide/self harm tags
11552356
I was thinking about that, and I think I will.
Oops, looks like something else got dropped too!
That level of desperation? In Canterlot?!? Oh Zain you fool, now she'll be too shook to investigate!
Sounds like somepony was engaged in blackmail! Possibly a noble had sway over him for a bad loan?
The old "pay us back or we break your kneecaps and leave a
horseponyhead in your bed?"Some rotten scoundrel got two good ponies killed, and is now getting away with it!