According to sources, the spy device was a recorder disguised as a pen. It was spotted by Meena himself while cleaning his desk, they added.
Soon after the discovery of the device, an investigation was initiated to ascertain whether it was deliberately planted there or left by mistake.
However, initial inquiries suggest that the device contains no video or audio recording. Still, police are looking to ascertain any likely motive that might have led to the device being left behind in Meena's office.
The AAP government had reacted sharply to the decision. Shortly after his appointment, Meena was asked by Sukesh Kumar Jain, Secretary and Director (Vigilance), to go back to Delhi Police as it was pointed out to him that no such post exists in Delhi ACB.
Further, Deputy Chief Minister Manish Sisodia had claimed that Meena had tried to frame him in the case of alleged suicide by Rajasthan-based farmer Gajendra Singh at an AAP rally here.
