Superintendent of Police (rural) Rakesh Pandey said Satbiri, mother of the main accused, Manish, has been booked under Section 120B (criminal conspiracy) of IPC for planning the attack on Teotia "to avenge her husband's murder".
A group of armed gunmen had on August 11 opened fire on Teotia's vehicle, seriously injuring him and five of his associates, when they were on their way back from a function.
So far, eight persons have been arrested in connection with the case.