You don’t mean front running. That’s a term of art in trading that means a specific thing. That is, trading against someone’s position you know in advance and you have a fiduciary duty on their behalf (e.g. your brokerage trading against you).
Sure, maybe just simple arbitrage. To tell you the truth I don't know the exact details. Of course he wasn't doing anything illegal (I wouldn't write about it), he didn't have any special access to the exchange
