Four people, including a three-year-old girl, were killed on September 1 at an apartment complex in Atizapán de Zaragoza, Estado de México, in an alleged robbery targeting a hardware wallet containing approximately $1.5 million in Bitcoin. The victims were musician and Camilo Séptimo co-founder Jonathan Samuel Meléndez Ochoa, his wife Ana Paula Barragán, their daughter and family housemaid Aleyda Romero. The family’s Golden Retriever was also killed, while their six-year-old son survived unharmed. Prosecutors say the suspects believed Meléndez Ochoa controlled about 30 million MXN in Bitcoin and killed witnesses as the robbery escalated. The case highlights the physical-security risks of self-custody, in which individuals hold their own crypto rather than relying on an exchange or custodian. Measures such as multisignature wallets (requiring multiple keys for transactions) can reduce the risk that one person or location controls all funds, while operational security and privacy remain important defenses. Two suspects were arrested within hours and face charges including qualified homicide, pregnancy interruption and animal cruelty, with a Wednesday hearing scheduled.