All the trash in the bin was different.
Glitch had hoped that some random person had done this before, but that was impossible now.
He knew all the cleaning happened in the morning, so if this was the work of some random guy, the trash in the bin would most likely remain the same.
There was also zero chance for the cleaner to collect the trash in the afternoon and leave the garbage in the alley.
The only plausible answer was that someone from that organization took all the letters along with the trash and replaced them with new ones.
These guys were acting nothing like bandits, and with this level of preparation, it felt like he was dealing with someone who was extra careful with their actions.
These actions increase the danger level of this organization in his mind. Glitch knew from his past life that the toughest opponents were those who even planned basic stuff like this small letter exchange.
