The photodissociation of the hydroxymethyl radical in excited vibrational levels of the Rydberg 3p(z) state is investigated by the core-sampling time-of-flight method and infrared-ultraviolet (IR+UV) double resonance ionization spectroscopy. Translational energy distributions of dissociation products of CH2OD (3p(z); v) are measured for selected vibrational levels. CH2OD --> D + CH2O (I) and CH2OD --> H + CHOD (II) are identified as major dissociation channels. Secondary dissociation from internally excited H2CO and HCOD photofragments is observed when their internal energy exceeds the threshold for H/D formation. Mechanisms for secondary H/D production include direct dissociation and dissociation following HCOD <----> HDCO isomerization. Several new overtone and combination bands of the 2(2)A"(3p,) <--1(2)A" transition of CH2OH are accessed by IR+UV double resonance spectroscopy. Initial vibrational excitation of ground-state CH2OH enhances the Franck-Condon factors for subsequent electronic transitions to the 3p(z) state. Lifetime broadening is observed for all levels in the 3p(z) state and the linewidth increases gradually with excitation energy from 11 cm(-1) for the origin band to 65 cm(-1) for the first overtone of the OH stretch. The broadening originates in increasingly efficient nonadiabatic couplings to other states.