The whole incident was captured on security cameras, which were thoroughly investigated by the court. She was shown on security camera giving a push or slap with an open hand to the manager who she thought had beaten up her son. The victims claimed in February she had caused no pain or harm, in April and October they wanted to change that statement, but the judges didn't allow for that.
One of the victims had also claimed she threatened someone, but the prosecution asked for acquittal because the other 9 witnesses didn't mention anything, including the person she allegedly said it to. The one that mentioned it, didn't mention the threat in February but only in April. The court acquitted her for that as well.