the vet's #1 choice. >> reporter: brittany stork's world was spinning. 13-year-old believed all the adults in her life were lying to her. had been lying to her for years. >> i was just so mad at everybody. it was just, "leave me alone. and you can't tell me what to do." you know, "you lied to me." >> reporter: a tragic car accident. that's what brittany had been told about her mom's death, but the newspaper articles she'd unearthed hinted at something far more suspicious. brittany made a copy of them and confronted her dad, toby. he'd been in an on-again, off-again relationship with her mom, dana, at the time of her death. >> and i can't remember what i wrote on it, but i know that it wasn't a very nice message. >> what's up with this basically? >> yeah, i think i actually told him i hated him. >> did he say, "okay, you're old enough now, i can tell you"-- >> unh-uh. >> "a more complete story"? >> unh-uh. he said, "you're not ready." >> "you're not ready," still? >> reporter: brittany wasn't sure her dad would ever tell her. he wasn't around much during