Long before he was a person of interest in connection with the homicide of Annie Le, Ray Clark III was simply another face in the halls at Branford High School. Clark's friends never expected to see him on the front page of area newspapers. They never expected to see his face on national news, on national websites. They never expected him to be connected to the case that has captivated the world's attention.

Police say Clark was a lab technician at the Yale lab at 10 Amistad and worked with Annie Le, the beautiful, promising young scientist. Kristin Murphy went to high school with Clark. She remembers him well.

"I was surprised. I was shocked. He was the sweetest kid in high school. I could never imagine him doing something like this. I can't. I just can't."

Murphy got a phone call from her sister last night when the news broke: Clark was officially a person of interest.

"I said, oh my god. Wait a minute. Let me see a picture... then, I was like shellshocked!!"

She cannot believe the high schooler she knew could do anything like this.

"I don't believe he did it," she says. "I really don't." "He was a sweetheart."

Kristin can't help but think how much life has changed since both wandered the halls of Branford High School.

"I don't know how to put it in words...i want to cry right now."