Gerardo altered the entire plan. After hearing the news from Roger, he canceled his plans to visit Laura's grave once more. For him, proving that he had nothing to do with Martin's death was far more important. After all, he has a reputation to defend.
His heart was no longer the same after seeing Roger's face in his mind when he received a call from a trusted person. Even though it was only an illusion, the awkwardness left an impression on him, and his little heart told him that it was all a sign.
Gerardo turned off the music in the car after receiving the call, so the atmosphere in the car was quiet once more. Gerardo was disturbed by that music, and his heart was becoming increasingly upset. Furthermore, the song that kept coming up was about heartbreak.