The Mumbai City Crime Branch has taken into custody a bank employee accused of manufacturing a fake key to crack open a customer locker in Mumbai’s Goregaon area and loot valuables worth approximately Rs 66.3 lakh. The arrest comes after the victim reported a massive loss of gold jewellery and diamond stones stored in a secure locker at a leading private sector bank. Police sources stated that the accused, who was posted at a branch in the western suburb, had secretly duplicated the original key and gained unauthorised access to the locker during working hours. Upon detection of the theft, bank officials immediately alerted the local police, who launched a swift investigation. Forensic experts examined the locker mechanism and found traces of tampering consistent with a cloned key. The suspect was traced through CCTV footage and internal bank records linking him to the vault entry logs. He is currently in judicial custody as interrogation continues. Law enforcement agencies are also scouring online markets and pawn centres across the city to recover the illicitly sold or pledged gold and diamonds. Such incidents of insider theft have raised alarms about the integrity of locker security protocols in several Mumbai branches. Banking regulators have repeatedly emphasised that dual-control mechanisms and random surveillance audits must be strictly enforced to prevent any single employee from independently accessing lockers. The ongoing probe may uncover a wider network if the accused points to accomplices involved in selling the stolen hoard.