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It has nothing to do with who spoke or who interrupted. It only has to do with what is a sentence. Speech tags are part of the same sentence as the dialog the report. Separate actions occurring aft...
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#3: Attribution notice added
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#2: Initial revision
It has nothing to do with who spoke or who interrupted. It only has to do with what is a sentence. Speech tags are part of the same sentence as the dialog the report. Separate actions occurring after the speech are separate sentences. Only the last of your examples is a speech tag, though an awkward one. The rest are separate sentences.