Hi
I need advise, i would be thankful if someone can give it to me for the following scenario.

I had two wallets
Wallet A
and
Wallet B

Wallet A sent 175 BTC to an address at an exchange
Wallet A then sent the remainder of the coins from Wallet A to Wallet B
Wallet B then sent 275 BTC to an address at an exchange.

I lost Wallet A
I still have Wallet B

I am in court proceeding and I need to show evidence that the change addresses of the 175 BTC (which were sent to that exchange) funded Wallet B.

I need advise which professional company can give me a solid blockchain analysis which will be used in the court of law to support my case.

I appreciate some names of blockchain analysis companies who will work for private individuals. I thank you in advance.