An Augusta woman was arrested Friday morning on several charges stemming from a January crash that killed two Maine Department of Transportation workers, the Maine State Police said.

Samantha Tupper, 34, is charged with two Class A counts of manslaughter, one Class B count of aggravated assault, two Class C counts of aggravated driving to endanger, and two Class D counts of endangering the welfare of a child, court records show.

A Kennebec County grand jury returned an indictment on the charges Thursday, state police said in a news release Friday morning. Police arrested Tupper without incident at a residence on Mayflower Road in Augusta.

Tupper was being held at the Kennebec County jail in Augusta, with bail initially set at $50,000 cash, state police said. It was not immediately clear if she would make an initial court appearance Friday. No attorney for Tupper was listed in court records as of Friday morning.

Tupper was driving a minivan in the Jan. 13 crash on Interstate 95 southbound near mile marker 127 in Waterville, state police said.

“The investigation determined that Tupper, who was operating a minivan, failed to stop at a posted stop sign at the end of the Kennedy Memorial Drive on-ramp and attempted to enter the passing lane, where her vehicle was struck by a tractor trailer,” state police said. “The collision forced Tupper’s vehicle into an active Maine DOT work zone, striking three workers.”

The crash killed James Brown, 60, and Dwayne Campbell, 51, both of Waterville. Two other workers were injured, according to the National Transportation Safety Board.

Brown and Campbell were close and part of a family who long worked for the transportation department, family members said following their deaths. They both loved spending time outdoors.

About 300 people, including Gov. Janet Mills, attended a memorial service at the Augusta Civic Center in February.

Mills, a Democrat, said the two were dedicated, committed, and hard-working state employees.

“If you needed something, they were there,” Mills said. “That is the hallmark of Jimmy and Dwayne’s characters.”

As Tupper’s car made its way through the work zone, fellow worker Chad Manson threw himself and another co-worker out of the way. Manson’s split-second thinking likely saved both of their lives, according to authorities and family members of survivors.

The National Transportation Safety Board is also investigating the crash.

The agency released a preliminary report two weeks after the crash, which among other things, detailed the road setup at the time.

“In the work zone, the southbound right lane and the acceleration lane at the entrance ramp were closed and the yield sign at the entrance ramp had been replaced by a temporary stop sign,” the NTSB reported. “The posted 65-mph speed limit was reduced to 55 mph through the temporary work zone.”

Two transportation workers, Tupper and two child passengers were transported to a local hospital with non-life-threatening injuries, according to the NTSB. The truck driver and two other DOT workers were not injured.

The NTSB does not investigate criminal activity, according to its website. The agency’s focus is on safety and determining probable cause. It investigates selected highway crashes nationwide that impact the public’s confidence in highway transportation safety, generate high public interest or highlight national safety issues, the NTSB’s website says.

Tupper’s driving record includes two license suspensions, in 2014 and 2015, Maine Bureau of Motor Vehicles records show. Two traffic violations appear in BMV records: a seatbelt offense in 2017 and a speeding ticket in 2020 for driving 82 mph in a 65 mph zone.

Tupper was sentenced in 2018 to serve four years in prison after she pleaded guilty to a drug trafficking charge.