Lackovic's footprints are found on the wall from where Iaccarino was pushed. Lombardo interrogates the guards one by one to try to understand more and she learns that the Serbian paid a lot of money to his wife via money transfer, sensing that she had a drug ring in prison. Meanwhile, Inspector Massini is promoted to commander.
One evening Testori, after snorting cocaine, remembers in a flashback that he killed Lackovic because he had killed Iaccarino and threatened to tell the truth about their privileged relationship.