GTA V - Jolene Cranley-Evans Murder Mystery

There are tons of in-game websites to explore via cell phone or any computer/laptop.  Online, you can find an article titled: "Another Vinewood Mystery: Blood on the Rocks," which talks about the accidental death of Jolene Cranley-Evans.  There is also this newspaper clipping:

In addition, you can locate clues about where the ghost of Jolene can be seen on Mt. Gordo.  To catch a glimpse of her apparition, you must be standing at a distance, near the correct location, and it must be between the hours of 11:00pm and 12:00am.  She will leave behind her husband's first name, "Jock," written in blood, on the rocks underneath her ghost.  If viewing her from behind, she glows and you can see a swirling black mist underneath her as well.  This murder mystery is considered solved.