Overview
- CBI officials visited TVK headquarters in Chennai to obtain participant details and CCTV material, including footage from a campaign vehicle.
- Investigators questioned traders and other witnesses in Karur and used 3D laser scanning to measure and map the venue for forensic reconstruction.
- The agency has summoned 306 people for questioning, including relatives of the dead and injured and members involved in mobilising attendees.
- Karur City Police Inspector Manivannan, who authorised the event, was interrogated on safety arrangements and coordination with organisers.
- The on‑ground effort is led by SP Praveen Kumar under a supervisory panel that includes retired Justice Ajay Rastogi and ADGPs Sonal Mishra and Sumit Saran.