It's an important, high profile investigation. I don't think there's any great significance to her arrest, seems more like a procedural thing to ensure they question people fairly, ie under circumstances where they have a solicitor present. Perhaps she (understandably) declined an informal interview. I don't think Scottish police are under directions from Westminster or the Labour Party either though.
As I understand it Police Scotland need to arrest somebody before questioning them - I don't think 'informal' interviews or questions under caution exist under Scottish law the way they do in rUK. Admittedly I'm by no means an expert so that may be incorrect. However that doesn't make this, or any of the aforegoing furore any less performative, stage-managed and inflated to trigger the outrage of an audience far beyond Scotland.
I wonder how much people not that aware of Scottish politics or the indy movement actually know about this. For example - the original complaint about the funds in question came from a guy called Sean Clerkin. You may remember 'England Out Of Scotland' banners on motorways & at airports during Covid - that's him, subsequently charged for 'racially aggravated' offences as a consequence. He's an extreme blood-and-soil nationalist who's been kicked out of radical indy organisations because he's basically too much of an obnoxious psychopath. I'm not sure what his personal end-game for destroying the SNP is, but he clearly holds a grudge.
Some background and detail about the actual complaint in this piece from January this year:
https://www.heraldscotland.com/poli...660k-snp-fraud-probe-complains-slow-progress/
As it says, the original complaint is simply that donations from 2017, towards an second referendum may have been used for party activities other than an independence referendum. Considering the sums concerned are, for a governing political party, comparitively trivial and would be eaten up in a week by Sunak's helicopter commuting - and are seemingly non-ringfenced donations owned by a private organisation - maybe the question ought to be why, exactly, this is such 'an important, high-profile investigation'. The rest of UK politics being quite so transparent and squeaky-clean, and all.
So, there is no suggestion that high-ups in the SNP have been pocketing this money for their own ends, but that doesn't stop the rhetoric surrounding it from implying
exactly that. As though no-one took a nanosecond to reflect on whether a high-profile and eminently bankable politician like Sturgeon could generate huge 'legitimate' income on the side anyway (just like every grifting Tory & plenty of Starmer drones seem to) without resorting to committing potentially imprisonable crimes for buttons.