STOP accusing people wrongly or sending them to prison because the catalytic converter a.k.a catalyst or indomie of your car is missing, except if you bring down the exhaust system of your car and you physically inspect and see that the catalytic converter is present in it before handing over your car anyone. The reasons are;

1. Scanning machines cannot easily or quickly detect the absence of catalytic converters if the oxygen sensors of the car are working well. In this case, the check engine warning light will only come up after a long drive which could even be after several days of driving; note that the check engine warning light will always go off when the fault courtesy absence of catalytic converters is cleared with a scanning machine or when the terminals of the car's battery are removed.

2. A car or the pot can sound well thinking its catalytic converters are intact when they have been replaced with a net or other things.

https://www.autosandcartalk.com/threads/here-are-the-reasons-you-should-stop-sending-people-to-prison-because-of-catalytic-converter-a-k-a-catalysts-or-indomie.846