ABC News has recently unveiled the details of an upcoming episode of "20/20" that delves into the tragic story of Antonio and Dawn Armstrong, a couple whose lives epitomized the American dream until a shocking event in July 2016 upended everything. Antonio Armstrong, a former NFL player, had transitioned into a successful business owner, and together with his wife, Dawn, they raised what appeared to be an ideal family in Texas.

The Armstrongs were admired in their community for their accomplishments and the loving family they had built. However, the facade of perfection was shattered on a fateful night in July 2016. The couple's 16-year-old son, AJ, called 911 in distress, reporting that he had heard gunshots coming from his parents' bedroom. The situation that unfolded afterwards was nothing short of a nightmare. When police arrived at the Armstrong residence, they discovered a horrifying scene: Dawn Armstrong was found dead, and Antonio was critically injured, fighting for his life – a battle he tragically lost shortly thereafter.

In a shocking twist, AJ, the teenage son of Antonio and Dawn, became the prime suspect in the case. The investigation into the deaths of his parents became a central focus, leading to a legal battle that spanned almost a decade. The case was brought to trial twice, each time resulting in a hung jury, leaving the shocking incident shrouded in mystery and the family's story without closure.