Do you have a source that he pleaded 'not guilty' in court?No he didn't. He said in an interview on sunday it was true he went outside his room and after them. However he did clarify he never touched them. They are however constistently rehashing the interview on sunday, the first part, as the "pleaded guilty" part of the press messages. This however is not the correct story.
Several sources (many probably based on Reuters, as cited above, but also news.com.au for example) refer specifically to pleading guilty as part of the account of the court proceedings, and his lawyer is quoted as saying, "it was agreed he should plead guilty".