She took a DNA test for fun. Police used it to charge her grandma with murder in a cold case

It was the middle of Jenna Gerwatowski’s workday at the local flower shop in Newberry, Michigan, when she got a call from an unknown number.

​ It was the middle of Jenna Gerwatowski’s workday at the local flower shop in Newberry, Michigan, when she got a call from an unknown number. Read More Breaking News, Latest News and Videos | CNN