The following is the Bitcoin wallet Hal Finney used to receive the first Bitcoin transfer from Satoshi.
1Q2TWHE3GMdB6BZKafqwxXtWAWgFt5Jvm3
The following signature
HM7vpPSUbNsfDHRX6gv8xxWcVNHEc/3pOk0YrVehaGoUdbWizznfzOdELkLd1EjSXsW1oE5vHAkNAPzrAVzhuoI=
decrypts to:
-----BEGIN BITCOIN SIGNED MESSAGE-----
This Transaction was made by Paul Leroux to Hal Finney on January 12, 2009 #bitcoin
-----END BITCOIN SIGNED MESSAGE-----
That signature type didn't exist until after Hal's was out of comission, so it was presumably created by someone who obtained hal's private keys after his death FWIW. You can see that address was actively sending transactions long after hal's death so *unambiguously* someone else has control of the key.
"That's my story. I'm pretty lucky overall. Even with the ALS, my life is very satisfying. But my life expectancy is limited. Those discussions about inheriting your bitcoins are of more than academic interest. My bitcoins are stored in our safe deposit box, and my son and daughter are tech savvy. I think they're safe enough. I'm comfortable with my legacy."