Last month, Cincoski said the earliest Cotter could have arrived in Chesterton that day was 12:30 p.m.

Cincoski said police are continuing to review more than 400 hours of video surveillance tapes collected from businesses in Chesterton and surrounding areas.

“We are still treating it as the worst case scenario … and making sure all bases are being covered,” Cincoski said.

Cotter was last seen alive by an unnamed citizen who was walking his dog at about 5:30 p.m. Jan. 7 on a Chesterton bike trail where Cotter’s car was found two days later.

Cotter’s body was discovered at Brassie Golf Course in Chesterton on Jan. 9. It is still unknown why Cotter was in Chesterton.

An autopsy revealed she died from blunt force trauma to the chest and abdomen. Porter County Coroner Victoria Deppe said Cotter most likely died sometime between seven and 19 hours after she was last seen.

Cotter’s whereabouts between the time she was last seen and when she was believed to have died are still unknown.

Deppe said toxicology and tissue tests could be available in the next two weeks.

“Drugs, alcohol, any kind of toxic substance, also any kind of medications ? anything like that is going to turn up in those toxicology screens,” Deppe said.

Cincoski said the Indiana State Police Department is assisting the Chesterton Police Department in processing evidence collected from the investigation.

He added that staff from the Mason, MSU and Michigan State police departments have helped in the investigation.

Nelson said Cincoski recently spent about three weeks in Michigan, despite the department’s budget, which is slightly less than $2 million.

“We don’t have that kind of budget,” Nelson said. “But we are trying to figure out what happened to this girl.”