Witnessing everything is enough. I am and many others are the proof of what they are telling.

If your house was stolen one day, and for some reason, you the Police find your belongings except the key of your car which was lost and you had a tape of your husband in the car?

Will you still need a proof that your husband is the one who stole your things from the house and got the keys of the car and took the tape from it which you was using to threaten him by showing it to police?or do whatever with it?
In this case, it is 98% sure that it was your husband who did it, or someone else who was hired by your husband to do it.

Don't be blind and use your mind