We don’t. Nor is there proof of how the money was obtained. But it makes a great one sided propaganda piece. All a person has to do is show the money was legitimately obtained, even if it is gambling winnings there is a receipt, and the government returns the money with interest.
What you said is absolutely not true.
To get the money back you must litigate against the municipality that took it. that costs a lot of money right there.
They are not obligated to return it, and make much effort to keep it.
In our country we don’t have to “show the money was legitimately obtained”. The burden is on the police to show it WAS NOT legitimately obtained.
“All a person has to do...”
That or your “one sided propaganda piece” quip independently reveal you as a police-state big-government statist. We both know it’s never a quick trip to the bank or business or, in this case, the church / orphanage in the next week. And we both know that typically the first pro-forma hearing is adjudicated by the same agency that just did the stealing, and is also typically delayed by some number of months. And all proceeds are minus attorney fees and lost work, of course.
In case you didn't grow up in the USA, and from your comment I suspect you didn't, in this country the burden of proof for illegal activity is on the government. The accused doesn't have to prove innocence, the government has to prove guilt. Asset forfiture reverses that presumption of innocence putting the burden of proof on the accused.
Further it is logically impossible to prove a negative ie that you didn't do something, because by definition you can't prove a lack of something. Which is why you should NEVER talk to police