It's been almost 50 years - who killed Karen Etta Whiteside?

Sources

• https://www.eugene-or.gov/4880/Cold-Cases
• https://www.findagrave.com/memorial/29365250/karen-etta-whiteside
• https://ktvl.com/newsletter-daily/cold-case-investigators-hope-dna-will-help-solve-decades-old-eugene-murders
• https://kval.com/news/local/he-saw-something-thats-been-in-the-same-photo-for-30-years
• https://www.oregonlive.com/news/2009/08/eugene_police_close_to_break_i.html
• https://www.newspapers.com/image/1094472407/?match=1&terms=%22Karen%20Etta%20Whiteside%22
• ​​https://www.newspapers.com/image/1178269839/?match=1&terms=%22Karen%20Etta%20Whiteside%22
• https://www.newspapers.com/image/1170108034/?match=1&terms=%22Karen%20Etta%20Whiteside%22
• https://www.newspapers.com/image/1094035124/?match=1&terms=%22Karen%20Etta%20Whiteside%22
• https://www.newspapers.com/image/200266174/?match=1&terms=%22Karen%20Etta%20Whiteside%22
• https://www.newspapers.com/image/1089261222/?match=1&terms=%22Karen%20Whiteside%22
• https://news.google.com/newspapers?nid=1310&dat=19780323&id=OvJVAAAAIBAJ&sjid=4eEDAAAAIBAJ&pg=6518,6151462&hl=en
• https://websleuths.com/threads/or-karen-whiteside-16-eugene-21-march-1978.87401/
• https://websleuths.com/threads/whos-who-in-cold-cases.32032/page-12#post-12440748
• https://www.reddit.com/r/serialkillers/comments/l0wefc/1978_was_an_important_year_for_true_crime/
• https://www.latimes.com/archives/la-xpm-1993-05-16-ga-36241-story.html