The two brothers of Ariel Castro stated they knew nothing about the kidnappings.
http://news.yahoo.com/blogs/lookout/pedro-castro-onil-cleveland-interview-132025979.html
I don't remember if officials have given details on whether the brothers all resided there, but if they did, I'm not sure how they could be completely unaware of the women in the basement. I'll withhold judgment until we know more about their whereabouts, I suppose.
I was thinking of adding that the other brothers may not have been in on it (unlike earlier reports). I don't know the layout of the house but apparently the girls were kept in the dark basement & the basement door was locked. There were many visitors & family over at the main perp's place. I the girls were locked away, then & they rarely got out. He probably told them not to make a peep when friends & family visited.
Ariel Castro was certainly a major sociopath, that's for sure. His own family & friends saw him as just a nice, regular, friendly guy. The guy who played a main role in the rescue, who folks have turned into "Antione Dobson 2.0", Charles Ramsey, was actually at a cookout with Ariel & thought nothing of him. Ariel could even feign sympathy & concern, attending the VIGILS & EVEN HUGGING COMFORTING THE VICTIM'S FAMILIES! *shudder* This Ariel Castro was a soulless person, relishing the families' pain (while feigning support).
And don't get me started on heaven-knows-what atrocities he committed on those girls in those 10 years. I've learned about all sorts of icky paraphilias & my speculations are leading me to parts & wish not to tread. These girls are going to have a HECK OF TIME recovering. I hope they do recover but I know they will be permanently scared & never be the same. PTSD is one of those things that really stick with a person & it must be epic with these ladies.
One of the girls seems to have gotten it worst, Michelle Knight. She's the third girl that doesn't get much attention for some reason.
http://www.thedailybeast.com/articles/2013/05/09/the-forgotten-victim-cleveland-s-michelle-knight.htmlThis girl's life was in the crapper even BEFORE she was abducted.