An affair dating back to the 1940s and the power of modern technology helped bring some closure for a Polk County family wondering who killed Teresa Lee Scalf in 1986. During a news conference Monday morning discussing the details of a years-long cold case, Polk County Sheriff Grady Judd announced after 37 years, investigators were able to identify the man who killed the 29-year-old registered nurse during the night of Oct. 27, 1986. According to the sheriff, Scalf had defensive wounds from fighting off a neighbor by the name of Donald Douglas, who was 33 at the time of the murder. He had reportedly "aggressively stabbed her and cut her," with her almost being decapitated in a "sexually motivated" attack. MORE: https://www.wtsp.com/article/news/local/polkcounty/teresa-lee-scalf-cold-case-polk-county-lakeland-florida/67-b9a58629-f3d1-4084-87de-a979aa91cd5a ►Subscribe: https://on.wtsp.com/youtube ►Website: https://www.wtsp.com/ ►Facebook: https://facebook.com/10TampaBay ►Twitter: https://twitter.com/10TampaBay