A homicide investigation is underway after a man told law enforcement that he killed another man during a fight over the weekend in northwestern Oklahoma.Open the video player above to see some of the headlines KOCO 5 is following.The Oklahoma State Bureau of Investigation told KOCO 5 a man went to the Fairview Police Department on Sunday and reported that he had gotten into a fight with another man. He also reported that he believed the other man had died.Police told the Major County Sheriff's Office, and authorities found a dead man when they went to investigate. OSBI officials said the man was identified as 40-year-old Dennis Wilder of Enid.>> Download the KOCO 5 AppAuthorities arrested the suspect, 39-year-old Thomas Walker, on a murder complaint.Law enforcement in Major County asked the OSBI shortly before midnight late Sunday to help in the investigation.Top Headlines Death of 18-year-old Moore High School student ruled homicide Police search for suspect after 18-year-old shot, killed at Oklahoma City home Sooners, Cowgirls set to host Super Regionals, one step away from Women's College World Series Oklahoma Department of Corrections implements statewide lockdown