UPDATE: Police released a new sketch, showing a clearer image of a man believed to be connected to the killings of the two teens. Click here for more.
Authorities are expected to release new information Monday in the months-long investigation into the slayings of two northern Indiana girls.
Indiana State Police Sgt. Kim Riley confirmed to NBC affiliate WTHR that new evidence would be released in the deaths of 14-year-old Liberty German and 13-year-old Abigail Williams.
Riley told the Associated Press a news release would be issued providing "very important" information that "will give people a clearer image of who we are looking for" in the unsolved double-murder case.
The photos and audio came from Liberty's cellphone. Police have hailed her as a hero for recording potentially crucial evidence.