What's an example of how much Chris cared about his sister,Carin?

From the text:

“He was always really nice to me,” Carine says, “and extremely protective. He’d hold my hand when we walked down the street. When he was in
junior high and I was still in grade school, he got out earlier than me, but he’d hang out at his friend Brian Paskowitz’s house so we could walk home together.”