The NEET 2026 paper leak scandal has escalated from a localized issue in Sikar, Rajasthan, to a significant investigation involving the Central Bureau of Investigation (CBI). Dinesh Bival, also known as Dinesh Lambe, and his brother Mangilal are under scrutiny for their roles in allegedly facilitating access to leaked exam materials that enabled multiple family members to gain admissions into government medical colleges. Investigators suspect that the brothers were part of a larger network that circulated a 'guess paper' prior to the NEET examination. Reports indicate that Rakesh Mandwaria, who runs a consultancy in Sikar, procured the leaked material for approximately ₹15 lakh (roughly $18,000 USD), which then spread among students in the region. The investigation has revealed that at least five members of the Bival family secured medical admissions since 2025, prompting the CBI to examine the legitimacy of these admissions. The NTA officially cancelled the NEET-UG 2026 examination on May 12, following the discovery of extensive similarities between the leaked materials and the actual exam questions. A re-test for all candidates is being organized, with details to be announced soon.