Last night's episode of "Explorer" on the National Geographic featured a segment on the double homicide of Douglas "Troy" and LaDonna French.
The couple were shot and killed in their house in the Bethany community of Reidsville on Feb. 4, 2012. Only their then-19-year-old daughter Whitley French Alvarez survived.
The "Explorer" episode looked at DNA which helped lead to the arrest of Whitley French Alvarez's brother-in-law, Jose Alvarez Jr.
Alvarez Jr. was convicted on July 8, 2016. He is serving two life sentences in Central Prison in Raleigh.
The episode aired at 10 p.m. on Monday. The episode can be viewed online here.