Of course there can be a retrial. Under suitable conditions.

Anyone who claims that this cannot happen, and that the decision of the jury is sacrosanct is obviously unaware of the way the rule of law works.

It may be that there cannot be a retrial without new evidence being brought, but retrials (even where there has been a jury verdict) do happen in this country.

Some people found guilty of murder (by a jury) have even had retrials.