Chris could feel that Olivia was feeling scared and nervous like what if this wasn't a suicide what if it was a murder then there is someone in this town killing people it worried him also but there was no way of knowing it's not like you could go up to Zoey and ask "Hey Zoey did someone murder you or did you kill yourself?"
Chris couldn't bear to look at the officer and tell him stuff but he knew later he would be interrogated by the officer or even other officers so he was going to have to say something sooner or later it worried him not knowing what was going to happen it scared him Chris is the kind of person not knowing something is going to happen that is bad hurts him and he doesn't like it.
Chris kept on thinking on and on about his sister but something in his head was distracting him then he realized what it was it was Olivia's hair it smelled beautiful yet so normal he loved it but he then thought "Why am I smelling her hair?" he didn't know what was going on was he feeling something for a married woman who's husband he was friends with he knew he couldn't do this it was wrong so he started to pull away from the hug.