Police say the man in this photo and composite sketch is a white male weighing 180 to 220 pounds, with reddish-brown hair and unknown eye color.
Authorities noted that the man's hat in the sketch may not be accurate, but encourage the public to "focus on the person's facial features".
The composite drawing is the result of information received during the investigation by the Carroll County Sheriff's Department, FBI, Delphi Police Department and the Indiana State Police.
If you have any information regarding the investigation, police are encouraging you to call the tip line at 844-459-5786.
The reward for information that leads to an arrest and conviction is upwards of $230,000.
Libby German and Abby Williams were reported missing by their family on February 13.
State police have released an artist's composite sketch of a man considered the main suspect in the killings of two northern in girls.
Grassley to call former Trump campaign chairman before Senate committee
Manafort resigned from Trump's campaign in August, long before the presidential election in November. Grassley has expressed his concerns with the Foreign Agent Registration Act (FARA) in the past.
Mike Patty, Libby's grandfather, said, "Please spread the information", when he heard about the sketch being released. They also released audio of a male saying 'down the hill'.
Indiana State PoliceThese photos show the suspect in the killings, police say.
"We've always felt like we are going to solve this", he added.
Indiana State police have released a sketch of the man they believe killed two teenage girls on a hiking trail near Delphi in central Indiana back in February. "We are actively looking for this person".