Chasing Horse portrayed the young Lakota character Smiles a Lot in Kevin Costner's 1990 film Dances with Wolves.

[2] He has appeared in three TNT telefilms with First Nations actor Eric Schweig: The Broken Chain, Into the West, and Bury My Heart at Wounded Knee.

[4][5] On July 6, 2015, after attempting to hold a Sun Dance ceremony in the area, Chasing Horse was banned by officials from the Fort Peck Indian Reservation in Montana as a "safety threat" because of charges of "human trafficking, sexual abuse, drug dealing, and intimidation of tribal members".

[7] The Las Vegas police, as stated in the search warrant, have found evidence of at least six claims of sexual abuse, with one victim reporting being assaulted at the age of 13.

[8] The allegations against Chasing Horse span multiple states, including Montana, South Dakota, and Nevada where he has lived for the past 10 years, and date to the early 2000s.