For people asking "how do we know he wont be read his rights" its because the DA Carmen Ortiz[1] said she wouldn't in the press conference immediately following the suspects capture[2].
1. https://petitions.whitehouse.gov/petition/remove-united-stat...
2. I haven't been able to find video although I saw it live, this site confirms http://www.theblaze.com/stories/2013/04/19/boston-bombing-su...