Trial of ASAP Rocky - what is this all about?

When a world-renowned artist was suspected of mistreatment in Sweden, the interest in the case became great. When one of the world's most powerful people, US President Donald Trump, got involved, the interest grew even more.

ASAP Rocky, or Rakim Mayers who is his real name, came to Sweden for a festival performance but stayed for almost a month. What is this really about?

ref: svt