thinking someone made off with your wallet 
(ROOT (S (VP (VBG thinking) (SBAR (S (NP (NN someone)) (VP (VBD made) (PRT (RP off)) (PP (IN with) (NP (PRP$ your) (NN wallet)))))))))
(ROOT (S (VP (VBG ) (SBAR (S (NP (NN )) (VP (VBD ) (PRT (RP )) (PP (IN ) (NP (PRP$ ) (NN )))))))))