Мафия 15. Cosa Nostra.

even in our time, there are special units on horseback

Yes, and they are most often with carriages, or as if with carriages. :D
It seems they reasoned that a horse is too obvious a clue, but a carriage is just right. And you keep writing about some kind of police on horseback.

Brack's profile:
Biography:
I was drunk, I don't remember...

drunks are often in an unconscious state

Okay, here's Amko writing:

How can our horses be connected to Gabriel? It's unclear.

What's unclear about that? The next person to complain about the nighttime events was Gabriel (Xostor). At night, he couldn't sleep well – he imagined the sound of hooves and the neighing of horses.

That is, since Gabriel imagined it, it must be related to him. Based on the same logic,

In the morning, in an alley near the house, Gabriel found Valentino (Magnus). Assuming that he was sleeping or, more likely, in an unconscious state, Gabriel called the doctors.

So, Magnus was in an unconscious state, not his killer. However, Amko easily accepts this version.

P.S. I apologize for starting a bit aggressively – I have little gaming experience. Maybe I was even terribly wrong. But let's listen to Xostor; maybe he will provide the logic that Magnus is not a doctor, and therefore the ambulance does not belong to him, but to the killer. And, of course, if Magnus is indeed a police chief, the sergeant definitely knows this and suspects who is twisting the facts.

Xostor, thank you, the explanation is good and clear. I agree.