Authorities say around 13 people have been arrested based on pending warrants against them unrelated to the slayings.
A 5-kilometer run on June 10 will serve as fundraiser for the trail changes.
Donations have boosted to the reward to $96,000 for information in the killings of 14-year-old Liberty German and 13-year-old Abigail Williams in Delphi.
Investigators have moved to a larger headquarters as they work on finding who killed two teenage girls.
Police say one of the two teenage girls killed last week in northern Indiana recorded the voice of a suspect in their deaths.
The man previously had been considered a person authorities wanted to speak to in the investigation.
The deaths of the two teenage girls are being investigated as homicides.
They are also trying to gain support for the educational facilities in the area.
It was only three years ago when Forbes Magazine declared Kokomo as one of the nation‘s fastest dying cities.
For the first time since he was elected to the Senate, Richard Lugar will face an opponent in the primaries.