Any Legal Eagles out there? The thing about the presumption of innocence. Is this absolute? Because it seems to me that it ought not be. Hypothetical for you. If someone walks into a police station and confesses to a murder. Surely innocence can't be presumed. The only issue could be stuff like accused not responsible due to mental deficit or self defense or something? So - not really murder at all but something else? Given such a confession, how can a jury pool be tainted by social media discussions of the case?
Even if your hypothetical happened, until the person who walks in and confesses is in front of a judge and enters a plea, the presumption of innocence remains. If the plea is guilty, then it just goes to sentencing by the judge, if plea is not guilty, then a full trial with a jury.
Onus is on the prosecution to bring evidence that satisfies the jury of the accused's guilt 'beyond reasonable doubt'. If prosecutor fails to do so, the verdict must be 'not guilty'. And of course, that doesn't mean the accused is innocent, just that the prosecution did not prove the case 'BRD' .
The accused does not have to prove their innocence.
This is why social media is a problem - the jury is meant to decide based
only on what is presented to them as evidence in the court, and have no preconceived ideas or go researching online for more details. What is presented in court by the prosecution and defence is subject to the rules of evidence, what is out in MSM is not. It may be hearsay, an opinion or just completely false. In a case such as Jill M's, it seems most people online have decided already.
Also, having photos of the accused published taints any identification by a witness, it has been shown that a witness who has seen a photo of the accused tends to select the person from an ID parade based on matching the photo, not on their own memory of what they witnessed.
In the JM case, and any similar, the prosecution will compile a brief of evidence and deliver to defence, based on what the brief contains, the strength of the evidence, will guide defence in advising the client. Ultimately it is still the client's decision on how to plead.
This gets back to the importance of Police being able to gather evidence and present the strongest possible case. If they are hindered because of some idiots who see it as their right to post any kind of rubbish and start FB pages calling for public hangings etc, then justice is the loser.