I don't think this is true (Though mtgox known fraud tendancy). There were so many causes for that price just rather than MTGOX fake prices -including china, increased coverage and the media).
Did you read the article? Shows huge amounts of money (USD) were basically being created out of thin air and used to buy bitcoins. (To the tune of $112,000,000 USD)
In general: While it is possible that Mark Karpeles set this up himself...what would his motivation be? I guess maybe hoping that his actions would prompt a buying frenzy and then he can sell out higher? But seems like an extremely risky move when there are a ton of better ways that he could have gamed the system.
Seems more likely that someone gained access to the mt gox deposit approval system and continued to approve non-existing $2.5M deposits. And considering there was a shocking lack of oversight at Mt Gox this went unnoticed.
If it's true that hackers made off with $112,000,000...that is insane...one of the biggest robberies in history?