Mexican Millionaire — Final Answer

THE ANSWER

Alejandro Ortega Ramírez was killed by Marisol Cruz Moreno — his brother's wife.

The motive. Don Juan is dying with 21 million pesos and a will that does two dangerous things. Clause 2: a child who dies before him hands his share to the surviving siblings. Clause 3 (Article 1316): a child convicted of killing a sibling is disqualified, and that share also passes to the rest. So: Alejandro dead lifts Diego from 7 million to 10.5. Camila convicted lifts Diego to all 21. Clause 4 says spouses have no direct claim, so Marisol could only ever reach the money through her husband. Diego witnessed and signed that will. What he knew, she knew.

At 3 PM on October 31st, Alejandro sent his sister two messages in their childhood code:

VAL LEARNED ABOUT THE INHERITANCE
DIEGO HAS GAMBLING DEBTS

He arrived that afternoon carrying what he knew. One sentence to his dying father and the will could be rewritten by lunch. Marisol had one night.

The night. Juan sedated and in bed by 21:30. Diego blackout drunk on the mat. Valeria asleep at 23:20. Camila said goodnight at 23:30 and left Alejandro alone by the water. Marisol had cleared the tables until eleven, had said goodnight to Alejandro herself, and was the only person awake who knew he was still outside. She struck him from behind with the molcajete she had cooked with all day. He drowned face-down in 80 cm of canal.

Why the others are clear:

• Valeria — the cipher names her, and the will clears her: under clause 4, her husband's death pays her nothing. Her watch has her asleep through the entire window of death.
• Camila — the frame. She wore the hummingbird at 21:17, took it off because Diego teased her, and left it on a table Marisol cleared. It surfaced only in the second search, two days later. She looks suspicious, but based on their messages, she and Alejandro genuinely loved each other.
• Diego — the biggest motive on paper, unconscious all night. Marisol herself testified she couldn't wake him.
• Juan — dying, sedated, in bed by half past nine.

What convicts her:

• Turquoise fragment in the reeds — and a turquoise bracelet on her wrist in the 21:17 photo
• The molcajete: a kitchen tool, in the hands of the woman who cooked all day
• No alibi after eleven. The alibi she gave her husband is the one she couldn't give herself
• She listed every pressure in Diego's life — the chinampa, the illness, the medical bills — and left out the debts.

She traded a family for a fortune she will never touch.

The end.