While I normally applaud the asking for sources, when the main article has both base data as well as linked blogs, some expectation of honest attempt of self-research is expected. However, here is some short number of links. More could probably be found if I was really digging.
If one want the relative short version, check out the blog post (http://qnrq.se/sweden-kidnapped-anakata/) or torrentfreak post (https://torrentfreak.com/sweden-kidnapped-my-friend-pirate-b...) about that blog post.
For each separate point:
use of counter-terrorism resources: http://www.ibtimes.com/pirate-bay-founder-gottfrid-svartholm...
strictly solitary: http://nyheter24.se/nyheter/internet/730683-pirate-bay-grund....
I would add that sweden do not have solitary treatment as an separate thing. It has 'häkte' with additional restrictions. In this case, the additional restrictions meant no talking to other prisoners. One hour per day of rest outside the cell, but strictly alone. One hour of visitation for the family per week, through only if the police had time. If that can be translated to the US version of solitary confinement is up to the reader to decide.
lies to the media and mother:
(http://www.ibtimes.co.uk/articles/382964/20120911/gottfrid-s...) and (http://nyheter24.se/nyheter/internet/727383-pirate-bay-grund...).
They initially claimed that he was deported because of a revoked passport. Once in Sweden, they changed their tune. Saying something in false pretense, then changing it once the circumstances is more favorable is the definition of a lie.
denying lawyer access:
See above link. Covers that too there. Check the linked blog article, and see statements from the mother. Want links for that too? An other source: (http://www.dn.se/nyheter/sverige/svartholm-warg-anhallen-for...)
Last, I would like to add that this is likely not to effect the trial. Swedish law do not address those kind of circumstances when determining guilt. If Gottfrid Svartholm lawyers brings it up, it could be an argument for lowering any sentence but other than that, its unlikely to be even brought up.