Craft a mellow and relaxing lo-fi hip-hop beat with smooth jazzy samples and laid-back rhythms.I need suspenseful and atmospheric music for a crime documentary. The music should build tension, with dark, mysterious undertones. Use low, brooding bass lines, subtle eerie strings, and occasional sharp percussive elements to highlight moments of revelation or danger. The overall feel should be somber but suspenseful, perfect for narrating a murder case with twists and turns. Avoid high energy or overly dramatic sections; keep it slow, subtle, and gripping.