dodgy T

I suspect the T is dodgy as he knows the system inside out and is playing it to the max. I am learning he has been setting up ltd companys and closing them, and it seems according to companys house they had no real trading, or assets. I believe he is hiding his money as he has been on at least 4 trips abroad that i have come to know of because of his absense when trying to inspect, that would add upto about £6k

Also he had a new car last year, and bought some furniture.
When he took the tenancy he faked the reference, and showed the agent a healthy looking business account. But only 2 months later he apparantly got HB ..the agent said "peoples finances change".

But i am highly suspicious now and i want my rent money. he is also moving his car ownership to his son to avoid seizing it. isnt that fraud ?
Whats the best legal leverage i could apply on this dodgy T ?

i was thinking of reporting him to the HB, the tax, and police for fraud ? what do you think. i dont really have any proof only things seem to be adding up the longer it goes on.