I don't think Amaral needs an excuse. He has as much right to express his opinions as anyone else; a concept some seem to have trouble understanding and accepting.
I don't see that publicising two false photographs in an deliberate attempt to interfere with an active police investigation comes anything close to "expressing an opinion".
Police had launched public appeals for information. During that time Amaral used what propaganda power he still had to blatantly lie using faked up information to fool and mislead possible witnesses by disguising Brueckner's appearance. About which you would still be arguing the toss had the actual video portraying what Brueckner actually looked like at the time of Madeleine's disappearance not been published..
Brueckner was and is the prime and only suspect in what the German Police are calling a child murder.
You and Amaral appear to have trouble understanding and accepting that the heady days of Amaral surfing from one TV studio to another promoting his narrative: Neither do I think Amaral needs any excuse as far as Brueckner is concerned - I think his behaviour speaks for itself and warrants the appointment of a good lawyer.
Caveat to that would be ~ he would need a lawyer anywhere else in the civilised world depending on jurisdiction ~ but the Portuguese apparently had a stake in Brueckner too
http://miscarriageofjustice.co/index.php?topic=12294.msg676756#msg676756 so he actively interfered in their case too.