Medium What?!

The guards went and told the intelligence department about Robin's orders, then returned to the house of the fourth corpse and stood behind Robin silently.

As for Robin himself, he acted as if they did not exist... 

He sat in that house for two hours, thinking about what had happened, the possible consequences, and how to prevent this in the future.

How to prevent this in the future... Another research road opened up, AGAIN!

Whenever Robin finishes long research seclusion and thinks he deserves an extended vacation, ten other urgent research roads arise for him that require his attention.

In the end, he sighed and ordered the body to be sent to the patriarch's office also with the other three...

He ordered them to tell the patriarch to send these corpses to the families they came from, that is if they had any... or to burn them if they were unknown.