In some ways Garrow was far ahead of his time; he coined the phrase "innocent until proven guilty" in 1791, although the jury refused to accept this principle and it was not confirmed by the courts until much later.
Pronesl větu: „ Nevinen, pokud není prokázána vina“ v roce 1791, ačkoli porota odmítla přijmout tento princip a právně byla tato věta potvrzena mnohem později.