VALENCIA, Calif. (KABC) -- A sister-in-law of former U.S. Sen. and Republican presidential nominee Mitt Romney was found dead in Valencia Friday evening.

Carrie Romney, 64, was found dead next to a parking garage in the Town Center area of the neighborhood, according to ABC News.

Preliminary information indicated she may have jumped or fallen from the garage, according to sources.

The Los Angeles County Medical Examiner listed her cause of death as "deferred" while toxicology tests were pending. The Sheriff's Department told ABC News it is conducting a death investigation.

An investigation is ongoing, and investigators are waiting on an official cause of death from the medical examiner.

Mitt Romney was the governor of Massachusetts from 2003 to 2007, and was the GOP nominee in the 20

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