Tugga Dunning

 was born in Holden, Kentucky to Frank and Doris Dunning.

On Halloween night in 1960, his father killed him, his sister Ellen, and his mother in a drunken rage. His brother, Harry, was the only one who survived. ("The Rabbit Hole")

Alternate Timeline
Jake Epping goes back in time to 1960 to try to make 2016 Harry's life better by stopping Frank from killing his family. Jake tries to get them out of town, but Frank discovers the ruse and stops them. That night, Jake goes to Harry's house and gets into a fight with Frank. Jake garrotes Frank and kills him. ("The Kill Floor")