Irish drug dealer's Bitcoin address transfers 500 BTC again

According to Arkham monitoring, Irish drug dealer Clifton Collins purchased $30,000 worth of BTC between 2011 and 2012, which is now worth $400 million, but he lost the private key and is in prison. These BTC were once thought to be lost until a month ago when 500 BTC were transferred for the first time after being dormant for 10 years. Just recently, another 500 bitcoins (worth $38 million) were transferred.