Forgotten story of singer's legacy, man who killed her

Six months after the death of the songbird who loved her family, her fans, God and video games, the question remains:

Police and court documents, family and witness interviews, photographs and video obtained by the Orlando Sentinel reveal how the lives of the troubled man and the talented YouTube star intersected.

While on tour, Mark played guitar for her, worked as road manager and made sure she ate breakfast every morning.

"There were little clashes like 'God, you take forever in the bathroom,' but in general, people always thought it was weird we never fought," said Mark, 23.

Mark helped bring her out of her shell and soon, that nervousness was replaced with confidence, fueled by her success in her YouTube videos that she started posting in 2009.

Christina and her family moved from New Jersey to California while she was still in high school to chase her dreams, even as Tina was undergoing chemotherapy for breast cancer.

Nora Loibl died at their St. Petersburg home in 2010 of an aspirin overdose, which was ruled accidental.

Kevin often retreated to his bedroom, withdrawing into video games and computers, covering the windows with aluminum foil and a comforter to block out the light.

Managers moved him around to different departments over the eight years he worked there, settling on him working on computers for the "Geek Squad" to reduce his interaction with customers.

[...] he discovered Christina on YouTube.

[...] she had snagged VIP tickets for the upcoming E3 gaming expo, a gamer's dream.

Christina donned her black high-heeled boots, a black wraparound skirt and a belly shirt.

Mark set up the merchandise table in the back of the theater, laying out black posters with Christina's name and her most recent album, along with shirts plastered with her face and their tour dates.

Mark strapped on a red electric guitar and took the stage with Christina, performing a cover of Drake's "One Dance" as their ope