SOURCES

https://en.wikipedia.org/wiki/Turnbull_Canyon

https://www.findagrave.com/memorial/95608847/robert-turnbull

https://www.pasadenastarnews.com/2009/08/04/woman-left-to-die-in-local-canyon-throat-cut/

https://www.sgvtribune.com/2016/05/25/la-puente-man-denies-killing-girlfriend-in-2011-dumping-body-in-turnbull-canyon/

https://paranormal.lovetoknow.com/ghosts-hauntings/turnbull-canyons-sad-stories-haunted-history

http://www.weirdus.com/states/california/local_legends/turnbull_canyon/index.php

http://thequakercampus.org/campus-life/mystery-of-turnbull-canyon-haunted-gates-of-hell-true-crime/

https://backpackerverse.com/turnbull-canyon-haunted/

https://www.nbclosangeles.com/news/local/authorities-seek-publics-help-in-fatal-hacienda-heights-shooting/2390633/