Ace Frehley passed away in October, and test results are now underway to determine the official cause.

The KISS guitarist passed away at 74 on October 16, his family confirmed.

A New Jersey medical examiner is now investigating, according to a new report.

The Morris County Medical Examiner revealed to TMZ that an autopsy was not performed on the musician. There is an toxicology screening underway, along with an external body examination.

The official cause of death will be finalized “in the next few weeks after the toxicology report is completed,” per the outlet.

See what members of the rock band said about his passing.

The original lead guitarist for KISS had been hospitalized due to a brain bleed following a fall in his studio.

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