FRYEBURG – A local woman died at a Lewiston hospital Friday, a day after she was struck by a Jeep in front of her home on Portland Street.

Tiffany Hamilton, 25, died Friday afternoon at Central Maine Medical Center. She had remained in critical condition there since Thursday night.

The death could mean an upgraded charge against an 18-year-old Brownfield woman who was arrested in connection with the hit-and-run accident.

On Friday, Tiffany Hamlyn appeared in Oxford County Superior Court in Paris where she was charged with aggravated assault and leaving the scene of an accident.

Hamlyn was arrested at her Shepherd River Road home Friday roughly three hours after the accident. Police at the time of arrest said charges against Hamlyn could be upgraded to manslaughter if Hamilton were to die.

Assistant District Attorney Richard Beauchesne said Hamlyn’s blood alcohol level was 0.17 percent, more than twice the legal limit in Maine, when she was admitted to the Oxford County Jail at 12:44 a.m. Friday.

He asked that Hamlyn’s bail be set at $10,000 cash or $100,000 surety.

Defense attorney Sarah Glynn requested that bail be set at personal recognizance or an unsecured amount, or that Hamlyn be released on a pretrial contract.

Justice Robert Crowley ordered Hamlyn’s bail set at $1,000 cash or personal recognizance with a pretrial contract. He also ordered that Hamlyn not operate a motor vehicle unless properly licensed, not use or possess alcohol or illegal drugs and submit to random searches for both.

Hamlyn remained at the Oxford County Jail late Friday night.

Police were also intensifying their investigation Friday, Fryeburg Chief Phil Weymouth said.

They say Hamilton was struck by Hamlyn’s Jeep on Route 113 around 7:30 p.m. on Thursday. Weymouth said Hamilton suffered head and possibly internal injuries.

Lead investigating officer Michael Hall said Hamlyn told police she had struck Hamilton, but initially thought she had hit a pothole.

Weymouth said the Jeep was damaged on the front fender, bumper, light assembly, door and mirror on the right side.

Weymouth said Hamilton had sent a text message to a cousin who lives nearby shortly before the accident. She was walking with a flashlight, facing traffic, and was struck about 75 feet from her driveway.

Weymouth said the investigation will focus on whether Hamlyn was intoxicated at the time of the accident.

According to a report by Hall, Hamlyn said she thought her life was over after hearing about the hit-and-run accident on a scanner at her house, so she drank some vodka before going to bed.

Staff writer Mark LaFlamme contributed to this report.