First, the article states that the Bitcoins were in fact transferred to a BKA wallet. Second, giving someone your private keys does not constitute a transfer o

First, the article states that the Bitcoins were in fact transferred to a BKA wallet. Second, giving someone your private keys does not constitute a transfer of bitcoins. It just expands the number of people able to spend the funds, while a real transfer make the former holder unable to spend the funds.