From the time he murdered his parents as a teenager until his death under an assumed name, William Les Arnold’s life intersected with several other people and it left many of them wondering who was he, really?This case is *solved*A huge THANK YOU to this month's sponsors:Refresh your spring wardrobe with Quince. Go to quince.com/crimelines for free shipping and 365-day returns.Start your detective work today at Newspapers.com! Go to Newspapers.com/truecrime and use promo code “CRIMELINES” for 20% off a subscription — and let the past tell its story.Events:AdvocacyCon September in Albuquerque: https://www.advocacycon.com/  November in Costa Rica: https://trovatrip.com/trip/central-america/costa-rica/costa-rica-with-josh-hallmark-nov-2026 Support the show!Get the exclusive show Beyond the Files plus Crimelines episodes ad free onSupercast: https://crimelines.supercast.com/Patreon: https://www.patreon.com/crimelinesApple Subscriptions: https://podcasts.apple.com/us/podcast/crimelines-true-crime/id1112004494 For one time support:https://www.basementfortproductions.com/supportLinks to all my socials and more:https://linktr.ee/crimelinesSources:2026 Crimelines Podcast Source ListTranscript: https://app.podscribe.ai/series/3790If an exact transcript is needed, please request at [email protected] Licensing and credits:Theme music by Scott Buckley https://www.scottbuckley.com.au/Cover Art by Lars Hacking from Rusty HingesCrimelines is a registered trademark of Crimelines LLC.