FWIW, in France, a few years ago, there was an academic study on the impact of TV on jury decisions [1]. This study concluded that the content of yesterday's TV news had a measurable impact on the duration of sentences inflicted by a jury.

I seem to remember that this led to a reform which removed the popular jury (and replaced it with a jury of law professionals) for some cases. I don't know if the effect of that reform has been studied.

[1] https://www.ipp.eu/actualites/impact-medias-sur-decisions-de...