The murder of Kyu Cho, his wife, Cindy, and their youngest son has caused overwhelming grief across the country. Cho was wise and educated beyond his age, a martial arts expert who also excelled in classrooms, friends and former team members say.

A page on the crowdfunding platform GoFundMe set up for William had raised nearly $1.5 million by Tuesday afternoon. "He loved being a father," said Brian Aniki, a close friend of Cho's who also met him in college.