We'll have to see the replacement election to decide that. Will the population change their vote in response or not.
Chances are he’ll be jailed or otherwise prevented from running.
If the evidence was serious it also would not make sense to let the election continue.
Finally I don't know about Romania, but in a few other countries in Europe, no matter what happens to that sullied candidate, these votes are not too likely to shift to the incumbent party. See for example the circumstances that enabled Macron to be elected the first time in France.