I think social media is slowly killing people getting a fair trial, as every fact or rumour is available so easily to everyone all the time and people can’t help being swayed by preconceived ideas.
Pre social media jurors were often excluded if they lived locally to the crime because they would be exposed to rumour that may be prejudicial one way or the other. That basically now includes everyone with internet access, so is more difficult to get an impartial jury.
I think we will soon move to trials with three judges rather than a jury, especially in murder cases.