“What evidence convinced a single juror to vote for conviction? “
People are weird. The lone juror may have thought ‘he looked guilty’ or some other non-evidentiary nonsense.
Or perhaps he/she thought that he was guilty simply because the police had arrested and prosecuted him. That used to be a prevailing opinion right here on FR not so many years ago.
I don’t recall any cases where a lone juror held out for conviction. Acquittal yes, but conviction no. I strongly suspect bias. My experience with several dozen juries makes me think that way.