A hit-and-run crash that killed a good Samaritan, a pregnant woman and her unborn child has drawn a second wrongful death lawsuit — this one to the tune of $ 20 million.

Attorney Gary Dawson on Thursday filed in Knox County Circuit Court a lawsuit on behalf of Stephanie Thornell, whose daughter and unborn grandchild were killed in the May 30 hit-and-run on Washington Pike, against a slew of people, including the alleged hit-and-run driver, his parents, a local bar and a woman whose call for help initiated the fatal encounter.

Curtis Scott Harper, 22, of Franklin, Tenn., is charged with vehicular homicide and related counts in connection with the deaths of Chasity Elaine Thornell, 24, her unborn daughter and good Samaritan Nelzon A. Soto, 45.

Authorities allege Harper was drunk behind the wheel of a 2004 Ford Explorer owned by his parents, Herb and Pam Harper, when he plowed into Soto and Chasity Thornell as they stood on the side of the roadway and kept going.

Soto’s widow filed via defense attorney Gregory P. Isaacs a $ 10 million wrongful death lawsuit in July.

In the most recent lawsuit, Dawson contends that despite Harper’s history of a prior drunken driving conviction and drug use, his parents bought the Explorer for him and allowed him to drive it.

“Plaintiff avers (the Harpers) knew and were fully aware of their son’s drug and alcohol problems but voluntarily chose to provide him with an automobile for his use,” Dawson wrote.

The lawsuit also blames The Hill, a bar in Fort Sanders, alleging employees served Harper booze even though he was clearly intoxicated. The bar’s owner has denied the allegations.

In a surprise move, Dawson also lists as a defendant Sarah Tinder, whose call to Chasity Thornell on the night of the crash led to Chasity Thornell being on the side of the roadway.

Tinder ran out of gas in front of Soto’s house and phoned Chasity Thornell, a friend, for help. The lawsuit alleges Tinder’s car was parked partially in the roadway and blames Tinder for both running out of gas despite a fuel warning light in her vehicle and failing to engage emergency flashers.

Tinder has filed her own lawsuit against Curtis Scott Harper among others alleging she suffered emotional pain after witnessing the crash.

Dawson is seeking on behalf of Stephanie Thornell and Chasity Thornell’s survivor toddler daughter $ 10 million in compensatory damages and another $ 10 million in punitive damages.

Harper is free on bond awaiting a criminal trial.