Married father, 29, 'murdered his estranged wife, 27, and her sister before driving nearly 400 miles to his family's home and killing himself with a bullet to the head'
Police believe Darrel Jackson killed wife Mallory and his 20-year-old sister-in-law, Meredith Opel, in Indianapolis Friday
He then drove to Jonesboro, Arkansas, texted his father he 'could not take it no longer,' and fatally shot himself in the head
Darrel and Mallory Jackson got married in October 2015 and welcomed their daughter, Camilla Rose, in early 2016
Police in Indianapolis recently had been called to the family's home for a domestic dispute
Before ending his life, Darrel Jackson posted a dejected status update, lamenting that he meant 'nothing to this world'