Girl Tries to Help Homeless Man – When He Looks Up, He Says “This Can’t Be True”

Explain this

“What?!” Maddy’s father exclaimed as he grabbed the locket from the man’s hand and stared at it. Maddy pulled her father’s arms down so she was also able to take a closer look. As if they rehearsed it, their gaze shifted from the locket to Maddy’s mother simultaneously. “What is this?” her father asked.