Murray grew up in Cedar Rapids, Iowa and attended Prairie High School, where he played basketball with his twin brother Keegan as a teammate.

[2] Following graduation, Murray and his brother enrolled at DME Academy in Daytona Beach, Florida for a postgraduate year.

[11][12] He averaged 20.2 points, 7.9 rebounds, and 2 assists per game and was named first-team All-Big Ten Conference at the end of the season.

[17][18] Murray's father, Kenyon, was a 4-year starter for the Iowa Hawkeyes from 1992 to 1996, and was high school Mr. Basketball in Michigan in 1992.

[19] Kris's twin brother Keegan was a top 5 pick in 2022 draft and currently plays for the Sacramento Kings.