Why were the police and prosecutors so keen to portray Jonathan Arnold, a businessman with a clean record, as the 'boss' of the enterprise when many facts suggested otherwise?

Source: https://www.dailymail.co.uk/news/article-12369439/We-spent-45-000-year-sending-boy-public-school-120M-drug-lord-Ex-Deputy-Crime-Commissioners-agony-son-jailed-23-years-cocaine-haul-plot.html?ns_mchannel=rss&ns_campaign=1490&ito=1490