Remy Ong is a friend, not just a forumer. I have not spoken to him as yet. Everything I know about the case comes from forums and news media, and hence I am taking a neutral stance in this episode.
My take:
(1) He is at (some, if not all) fault for not stopping and staying back. I will not go deeper in any argument whether he should or should not have, but we need to know that the individual response can be very situational - dependent on circumstances and panic factor. Please be mindful we could have done the same in some circumstances, example on NSHW, or on some dark stretches of Lim Chu Kang. Most of us would wanna think that we will stop and check out what we hit or how is the injured animal. But in truth, it all depends on circumstances. Let's not judge as if we are without sins and therefore could cast the first stone. But still, in my opinion, he should have stopped and stayed back and checked for the injuries of whatever he hit - be a dog or a toddler. Nevertheless, that's a judgement lapse at flashpoint, not necessarily indicative of his true character.
(2) He was not sure of the contact - he said he felt that the dog's tail has brushed against his car. I do not wanna dwell on the validity of his statement, but who will exactly be sure of how the collision happened? So, yes, perhaps it sounded like a tall tale to some, but that could well be the truth. Perhaps he was not good with his words, but I think the spirit should be innocent until proven guilty. Any judgement should be on what is fact, not what is opinion.
(3) He went back to the scene, waited for SPCA with the crowd. Not the easiest thing to do, but he did that. Sure, sceptics will say that's because the licence plate was left behind, and hence he had to drive back to retrieve. That's not verified, just pure speculation. Please give him credit for that, unless you are all out to bash him no matter what.
(4) He accepts responsibility for the matter - admission of wrong-doing. What else should he be doing, given that he has already committed a lapse of judgement?
(5) I could not see any relevance of him driving a "black Porsche Boxster" unless the crime is amplified based on marque. Serious socio-behavioural flaws in the media reporting. Akin to those "drive Porsche big fark" comments on STOMP.
(6) I also could not see any relevance of him being a national bowler here. Anyone could have made this wrong judgement call of not stopping at site of accident. He made a wrong judgement call, but please do not crucify him based on supposedly higher moral grounds. National sportsmen might be role models to some, but they are humans too. One could label him as "irresponsible after an accident" but no one can say he is a morally questionable person, unlike a politcian who is suspected of adultery.
The context of assigning blame to him has to be fair.