In 2021, while China-born businessman Chen Zhi was building a multibillion-dollar empire now enmeshed in multiple criminal allegations, staff at his family office in Singapore ran into seemingly minor technical glitches. At first, some of them struggled to connect to the office copier. Days later, the door badges stopped working. After they regained access, staffers quickly realised they had a much bigger problem: millions of dollars had been siphoned from Chen’s bank accounts. While the founder...