Taarak Mehta Ka Ooltah Chashmah S01 E2099 Catching The Culprit

"Problems Toh Hain Sabke Saath, Bas Nazariye Ki Hain Baat!"

Jethalal, Natu Kaka and Bagha try to catch Manhar, Jethalal finds a letter in his coat. Popatlal and Inspector Chalu Pandey arrive at Gada electronics to arrest Manhar but Jethalal stops them. Why is Jethalal stopping them? What was written in the letter?