Wolters the German Prosecutor with full access to all the information, experience and expertise at his disposal says they have conducted a serious investigation and concluded that there is no evidence whatosever to suggest the McCanns are involved.
G-Unit, an anonymous elderly lady on an internet chat room says she doubts Wolters professional integrity, despite the fact she has no contact with the investigation, has no idea what is going on within the investigation, does not have years of professional experience or expertise, does not have access to all the amassed investigative material.
Whose opinion has more credibility and weight?
Don't tell me - I can guess.... 
Importance of cell phones and witnesses in the investigation
On the matter of the cell phones and the association of the cell phone numbers during the investigation at the time of the disappearance, Gonçalo Amaral has doubts about the origin of those numbers recently associated with the German suspect Christian Brueckner: "Is anyone sure that this phone belongs to this man?” he questioned, underlining that "small details like this, is what makes the evidence". Translation by Joana Morais
I know nothing about Amaral's allegation that Brueckner had been eliminated from the inquiry in 2007. But his insinuation above ,,,
"Gonçalo Amaral has doubts about the origin of those numbers recently associated with the German suspect Christian Brueckner" certainly prompted a ping on my antenna.
Quite obviously being distracted by concentrating on the McCann and their friends' phone traffic the PJ somehow managed to miss the phone contacts between criminals who were interviewed in Portugal by SY in 2014.
They somehow managed to miss a lengthy phone from a known paedophile and criminal at the same time despite interviewing him and eliminating him according to Amaral.
Quite obviously no-one thought to check the logs and ask to see his phone.
Is it a poor translation of what he actually said or has he actually insinuated malfeasance?