Haunting last picture of missing teen Alison Jillian Chao, 15, riding her bike to relative's home before vanishing

A haunting photograph of a straight-A student riding her motorcycle to her aunt's location is nan past clip nan teen was seen earlier vanishing - arsenic her family is hopeless to support nan nationalist progressive successful nan case. 

Alison Jillian Chao, 15, was past seen connected Tuesday connected surveillance footage riding her GT upland motorcycle from her father's location successful Monterey Park, California, to her aunt's successful San Gabriel astir 5:32pm, according to ABC 7. 

The travel was only 4 miles, but nan young woman ne'er arrived, her family told KTLA. 

'The much clip that goes on, nan scarier it gets,' her mother, Annie Chao, told nan outlet. 'I’m acrophobic nan nationalist will suffer interest, and it will beryllium harder to find her. There’s little evidence.

'I haven’t slept successful days, and it’s conscionable each parent's worst nightmare.' 

Chao is astir five-foot-two, weighs 96 pounds, and has achromatic hairsbreadth and brownish eyes. 

She was past seen wearing a purple t-shirt pinch achromatic shorts and acheronian shoes. She was besides carrying a backpack. 

Chao has not contacted anyone aliases posted connected societal media since her disappearance.  

The family has been hanging flyers astir Monterey Park successful hopes that personification will admit the Mark Keppel High School student. 

'It's been very chaotic,' Annie told ABC 7. 'It sounds crazy but, we don't person a play-by-play for this benignant of stuff. What do you do? As a parent, you're making flyers, you're contacting nan news, we were retired driving astir to anyone that was open, posting up flyers. We reached retired to nan community. 

'The organization has really travel together to thief maine look for my small girl.' 

Annie recalled a McDonald's worker who called disconnected activity and drove astir nan metropolis astatine 1am aft nan communicative 'hit home' for him. 

'He drove astir astatine 1 successful nan greeting looking for her pinch me,' Annie said done tears.  

The mother said her her girl was bubbly and upbeat and had a batch of energy, according to NBC Los Angeles. 

The Monterey Park Police Department Investigations Bureau is investigating Chao's disappearance. 

DailyMail.com has contacted Annie for comment.