I was the OP of coarse I read the story (FULLY), but she no doubt also has at the point she was interviewed so I do not see your point.
His father on the other hand has his head screwed on the right way!
"Sinaga's father has previously said his son deserves a life sentence for his crimes."
He own's a massive business in a socially illiberal country, I feel there might be a certain desire to not rock that boat, so it's hard to say what his real opinion is.
I still feel like you're not focusing on the chain of events, it's not unimportant to the article you've posted as it identifies points where she had little reason to suspect anything about him (without necessarily being that detailed), especially since the victim was charged with assault at that moment. She had every reason to think it was a false allegation going by character assessments of her son.
There's a somewhat more detailed article than the original story, just in case there's a bit of confusion -
https://www.bbc.co.uk/news/uk-50688975
Obviously there's even context missing there for this particular criticism, we don't know when she saw him at the hospital or whether she was told of the investigation before being asked for a statement, so it's just a bit opportunistic to me to attack her when we know so little. All that can be said is that she is his mother and that comes with an inherent confliction, though it would be wise of her to at least acknowledge what he did, that can never be easy.
The media is too haphazard to jump the gun on people, especially recently, the framing of that article was just too convenient for that. Not trying to be dismissive though, there are still valid reasons to criticise her (and his father) regardless of the context, or lack thereof. But there's still limits there, ultimately this is her son's fault for being a disgusting ******** who abused people's kind character for his sexual gratification.
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