Indiana State Police are continuing to piece together a timeline of events leading up the death of a Greencastle High School senior on Dec. 15.
Dietrich Jackson, 17, was found dead in his grandmother's Greencastle home after attending a party the night before.
Indiana State Police District Investigative Commander Jeff Hearon confirmed Thursday that Jackson did not die of natural causes, but could not provide any more specific details, such as the results of the toxicology report or the actual time of death, as the investigation is still ongoing.
"We are actively investigating this," said Hearon, who says that there are four detectives and a crime scene technician working the case.
The detective refused to identify any targets of the investigation but said that the ISP have been receiving numerous tips from the community.
"We're working long hours interviewing multiple juveniles, adults as well as parents who have come forth with information," he said. "We've been getting some cooperation," he added, "but some people are not being as cooperative because they would place themselves at a location and bring embarrassment upon themselves."
According to Hearon, the ISP is aware that threats have been made against individuals alleged to be involved in the events surrounding the teenager's death.
"The school is taking precautions and the Greencastle Police Department is aware of the threats," he said. "We're trying to be proactive."
Greencastle High School Assistant Principal Russell Hesler confirmed that the school had beefed up security in response to rumors of possible violence.
"Anytime I get a tip or information I have to act on it," said Hesler, who reported that two additional police officers were stationed at the school Thursday morning. "I have to take precautions to maker sure that every kid is safe."
Hesler says the school day passed without incident.
ISP officials were unwilling to give a firm timetable for their investigation, but urged the community to be patient.
"I'm hopeful we can get the majority of the information in the next few days and bring this to an end," Hearon said. "But sometimes these things take a turn and that doesn't happen."