Did Harry ever inform anyone about Lucius Malfoy?
I am watching these movies for the first time now and I have just seen The Order of the Phoenix. I have a question about Lucius Malfoy being revealed as a Death Eater and supporter of Voldemort in The Goblet of Fire and this movie. At the end of Goblet of Fire Lucius is revealed to be a Death Eater for Voldemort when they're at the graveyard. After that Harry returns to Hogwarts but I don't recall him informing Dumbledore or anyone else that Lucius Malfoy is a Death Eater or even works for Voldemort. I was surely expecting Harry to tell someone in this movie but he didn't either! You would think that is pretty important information since his son studies at Hogwarts too. And I don't think that his son studying there is even that important. Lucius Malfoy is quite known in the Wizard world, isn't he? Shouldn't anyone be informed about him being a Death Eater and working for The Dark Lord, the most feared enemy in the whole movie??
What I found quite strange is that at the end of Order of the Phoenix in the scene at the Ministry of Mysteries we see Lucius again with the other Death Eaters but everyone (Hermione, Ron, etc.) don't seem suprised to see him as a Death Eater. I mean, in the first movies he is clearly not a good guy judging by his behaviour and the way he looks down upon everyone, but he's not revealed to be an enemy yet until Goblet of Fire.
Did Harry tell someone about this in the books? Or didn't he? Can someone please explain this?