Okay, now while this is still early news, some people (including myself) may have noted how the articles covering Christopher Evan Welch’s death place his date of birth as 1965 an his age at the time of death as being 48. Now some simple maths will tell you that he could not have possibly been 11 at the time of AoStH's production as is often (and clearly so if you watch the show) said to be if this were the case.
In fact, it is quite possible people credited Christopher EVAN Welch for Tails retroactively due to his notability (the show simply credits Christopher Welch). I have also noticed that the Empire article I linked removed the reference to his role as Tails which puts the matter into further doubt. Of course the other possibility is that someone just got the dates mixed up along the line. Unfortunately, there is little on-line info on a ‘Christopher Welch’ which doesn’t link to Evan.
So the good news is Tails’s VA may still be alive, this of course should not diminish the death of Mr Christopher Evan Welch in any way and I give my condolences to his friends and family. The bad news is that if the Christopher Welch who voiced Tails is alive and well there is pretty much nothing known about his current status and he has been mistaken for another more well-known actor, which is rather sad I feel.
However as said earlier this is early news, but if someone knows the status of the Christopher Welch who starred in Adventures Of Sonic The Hedgehog then I or any news outlet would be grateful to hear of it so this issue can be cleared up.
Also if Christopher Welch is still alive I would like to apologise for spreading misinformation and mis-crediting Christopher Evan Welch.