The recent decision by the US government to regulate the a few of the big tech giants was a strong one. In response to that decision, Google's CEO has said strongly that they are fully prepared to be part of the investigation. Read more at english.newstracklive.com
The CEO further adds that Google is already facing such scrutiny in Europe. The US government's investigation is related to the advertising and discrimination in Google's search results.
Google seems to have been facing scrutiny for the same reason in Europe as well.