A high-profile case involving the murder of two teenage girls that has gone unsolved for five years could have a major development on Monday.

In an interview with Fox News that aired Tuesday, German's grandma, Becky Patty, said police have DNA in the case.

Kelsi German, a student at Ball State, spent more than an hour and a half addressing different issues surrounding the case.

Kelsi German's 14-year-old sister Libby was killed, along with 13-year-old Abby Williams, in February 2017 while hiking in Delphi, Ind.