HLN Investigates: Toxic Love: The Gabby Petito Tragedy

22-year-old Gabby Petito vanished after taking a cross country road trip with her fiancé, Brian Laundrie. When he returned home to Florida without her, red flags and accusations began to fly. Her disappearance quickly went viral on social media, capturing the attention of the internet and ultimately leading to the discovery of her body thousands of miles away in the Wyoming wilderness. Did their toxic relationship lead to her violent death? Police reveal details behind that now famous traffic stop, and HLN producers trek through miles of national forest uncovering answers about Gabby's final days.