yes, this episode was really very shocking and sad...brothers get pampered in many families over sisters but they do not go the extent of raping their own sisters...this case came up, but probably such things do happen though on a very low scale...
still something needs to be done to prevent such cases...I believe India is still a sexually suppressed society...perhaps prostitution could be legalized - so that brothers, fathers do not get so desperate that they turn to their own sisters / daughters to satisfy their sexual urges...
in many families girls are not allowed to keep boy friends...may be parents should allow their daughters to have boyfriends...this way young boys would get to enjoy more female company and not grow so frustrated...even consensual sex between 2 mature adults should not be looked down upon...at least this would help prevent rape n murder...
May be sex education needs to brought out in schools n colleges...the brother n his friends had access to po*n, magazines but perhaps no mature elder to guide them on such issues...an educated brain is perhaps more stable...
What has happened has happened...the above may serve as preventive measures...