What don't you understand? You said 'appropriately', then changed it to 'in the SNP's opinion'. I clarified that regardless of whether the SNP thought it was appropriate use of funds, or whether in their opinion it was OK, the police think obviously think very differently for an arrest to be made (esp at that level).
If the SNP had any doubts - and as you rightly say, this has been ongoing for some time, so it can't have come as a surprise to them - I'd have thought they would have got independent advice and scrutiny and published that in the interest of openness and transparency. Instead, they appear caught with their breeks down.