The suffrage of LTT due to blood loss and glass exploding seems to strike me as more of a clue worth noting. Secondly, as no one seems to have pointed it out and perhaps doesn't know, L is the main character in Death Note series, where a kid of a police chief can write any sort of death description down in a notebook and have it happen. Glass exploding inward seems to be something improbable short of magick or sound waves at the right frequency.. perhaps someone's profile would reflect this?
I also agree that the bit about the 'horn not heard in time' would reflect against someone's profile as it sounds like a metaphor or definition for something as well as pointing out how massively alone he was, perhaps even in a deserted street far from civilization. Possibly on a road trip.
As for the death of Pyrr, perhaps something that has to do with heights or a hotel/apartment building that would contain many floors and a balcony. Pushing people, creeping with a knife, and explosions(?) were what killed folks; so yes that gives at least three mafia clues overall.
I am rushing out to drive to Tucson so I won't be back for 10 hours and am unable to look more into my suspicions about folks, but wanted to let everyone know that I won't be inactive and give at least some pointers along my thought lines.