If the BTC's are still there, move them asap to a much secure wallet and probably you will be the only one who knows. Crypto is money and the personal interest of other people with other's fund is there.
Yea i directly moved all BTC to a secure wallet.
Great! at least you have now secured your bitcoin funds.
-snip-
Also the thing on my mind too and highly suspect that his friend is the only one who do took those coins and he's too merciful not to get those BTC's or sweep all the balance for it not to be soo obvious but eventually if a hacker or someone do able to access the keys then those coins will be sweep out totally.This is the hard part where you do trust up some people
in regards with money where anytime they would be tempted to stole it out specially if we do talk about big sums on here.We cant really be sure their loyalty anytime.
We don't know what's the interest of the robber maybe he did noticed first the USDT and Ethereum before noticing that there was BTC. You are right, if it's a hacker from out of nowhere, he won't have that kind of mercy for the BTC and he will wipe out everything on that wallet.
@haszel88, have you talked to your partner heart to heart regarding this incident?