When Isabel Hellidoro was being sent to Portugal, she had one thing in mind: eliminate her acolytes. The answer was one simple thing: Power. She got power by killing those who stood in her way. With the death of Isabel's acolytes, she would be the most representative member for The Turk, and later maybe even a member of the Turkish Board of Directors. Gérard knew her ways of treating others; when she last requested a position in at the Board, Gérard was the one fighting to his last breath for not letting her become a member. Killing him, was a mere revenge.
When a Templar named Xaviér de Margiot threw a lavish party, Isabel hired a young man to kill Gérard and his associates. Gérard had just shared a glass of wine with his co-worker, Josèphine, when she noticed some movements at the rooftops. Gérard told it just were hallucinations, and so the two fetched another bottle of wine. When they cheered and drank, Gérard felt a bit dizzy. He lost the glass, falling dead to the ground. The poison was on his glass, making it impossible to taste something strange with the drink itself.