Falk learns from eavesdropping that, despite his disagreement with Raco earlier, in the end Raco still wants to try to protect Falk, hence why Raco tries to counter Deacon’s harassment charge against Falk by bringing up Deacon’s own likely involvement in vandalizing Falk’s car. The fact that Deacon brings up new information in his testimony seems to have a clear link to his dementia. Deacon’s new statement is potentially riskier, because there is an easy way to check if he was really on the phone with the pharmacy.