Today the family of Seung-Hui Cho released a statement to The Associated Press saying they felt "hopeless, helpless, and lost" and would "do whatever we can to help authorities understand why these senseless acts happened."
Throughout the week, they have been the recipients of overwhelming criticism from observers who continue to wonder how this tragedy could have happened, how they missed the warning signs, and how could their child could commit such a horrible act.
One man, David Kaczynski, is far too familiar with the plight of the Cho family.
His brother Ted Kaczynski is known to many as the Unabomber, the brilliant mathematician who was also a calculating murderer. For a period of 17 years, beginning in the late 1970s, Kaczynski created homemade parcel bombs, killing three and injuring 23 people.
ABC's Martin Bashir met with David Kaczynski on Thursday at the Melanie Ilene Rieger 11th Annual Conference Against Violence in Waterbury, Conn.
Like Seung-hui Cho, the Virginia Tech student who killed 32 people on Monday, Ted Kaczynski also produced a manifesto -- a document that raged against society and, in particular, the effects of technology.
For Kaczynski's younger brother David, this week has been a dreadful experience of deja vu -- the horror and anguish that comes with finding out that a member of your family is a killer.
"This all brings back terrible memories," he said.
'What's Wrong With Teddy?'
David and his brother Ted grew up together in Chicago, their family the apparent model of a perfect picture. But behind the happy portrait there were worrying signs of the trouble to come.
"I loved my brother. I adored him. He was a good big brother and always treated me with kindness, sometimes incredible kindness," said David Kaczynski. "I think there was probably a time when I asked my mom, 'What's wrong with Teddy,' and she said, 'What do you mean, there's nothing wrong with your brother.'"
When David Kaczynski looked at his brother, he saw an isolated, sensitive individual who had problems socially. Ted, said his brother, didn't have "the kind of social interactions that I had. He was much more comfortable reading a book in his room than hanging out with his friends or playing sports."
Kaczynski's family searched for a way to amend his behavior.
"We talk about it endlessly. You have to remember that in Ted's case, unlike Cho, there had never been any violence or threats of violence. We had thought Ted was completely harmless," said Kaczynski. "My nightmare of Ted was that he might hurt himself, you know, because after a period of time it became clear that he was gripped by some kind of despair."
Troubled…and Turned Away
Ted Kaczynski had estranged himself from society and excluded himself from family events. Like Cho, Kaczynski's writings were also called into question and his behavior had began to worry those close to him.
"We actually ended up calling a family doctor in the area whom Ted had seen and hoped to persuade her to use her influence with Ted to persuade him to get into treatment," said Kaczynski, "but even then I thought we were clutching at straws."
Kaczynski admits that at first, his brother's odd behavior was accepted as part of his character. "That's the way Ted is. He isn't a label in a book, he's my brother. He isn't hurting anyone. He's living the life he's choosing."