Legal proceedings began in the Nigerian capital Abuja on Thursday, targeting the cryptocurrency exchange Binance and two of its executives on charges of money laundering and tax evasion. Tigran Gambaryan, a US citizen and Binance's head of financial crimes compliance, appeared alone in court after Nadeem Anjarwalla, a British-Kenyan and the company’s regional manager for Africa, escaped custody and fled. Gambaryan's family is asking for the US to do more to secure his release. Find out why Nigeria is cracking down on crypto in this week's edition of Tech 24.