The motive for the murder was enveloped in a mass of misleading clues.
Advanced English Dictionary
+verb [VN] ~ sb/sth (in sth) (formal) to wrap sb/sth up or cover them or it completely: She was enveloped in a huge white towel. + Clouds enveloped the mountain tops. + Darkness fell and enveloped the town. + A feeling of despair enveloped him.
Random quote: What you fear is that which requires action to overcome.: Byron Pulsifer