(CHICAGO) Lake County investigators have received reports on tests for gunshot residue and ballistics in the case of slain Fox Lake officer Charles Joseph Gliniewicz and the results “do not support or exclude any specific theory in this investigation,” the Sun-Times is reporting.

Lake County Sheriff’s spokesman Detective Christopher Covelli declined on Monday to reveal the results of those tests, citing the pending investigation of the death of Gliniewicz, who was found shot to death on Sept. 1 in an isolated area in the Far North suburb.

The death sparked a massive manhunt that has failed so far to produce any suspects. Police have acknowledged that they have not ruled out the possibility of suicide.

Covelli also said there was DNA from an unknown individual discovered in several locations at the scene, and the quality of one of the samples is good enough to run through a database of known offenders.

Investigators met with Lake County Coroner Thomas Rudd on Monday. Questions were raised in the case after the Chicago Sun-Times reported that Rudd had not been made aware of a meeting earlier this month between police and his pathologist on the case.

Rudd’s absence from the meeting came as investigators took the highly unusual step of criticizing the coroner in a news release and at press conference for releasing limited information about the case.

Covelli described the meeting on Monday as going “very well.”

“It was to share information and to make sure we’re all on the same page,” Covelli said.