How did Pune teacher, mastermind in NEET UG case, leak question paper?

A Botany teacher from Pune, Manisha Gurunath Mandhare, has been arrested over NEET-UG paper leak. In April, she got in touch with NEET candidates through accused Manisha Wagmare and gave coaching classes at her house. She allegedly disclosed important questions from Botany and Zoology and made students note down the same in their notebooks and also mark in their textbooks.