The aim of this study was to investigate a case of sleepwalking associated with violence (non-REM parasomnias) and obstructive sleep apnea-hypopnea syndrome (OSAHS) following treatment strategies. Here we studied a 60-year-old man with family history of a wide range of sleep disorders. His quality of sleep, anxiety, depression, quality of life, and possibility of post-traumatic stress disorder (PTSD) were examined using the standard questionnaires upon pre-treatment, post-treatment, and follow-up phases of the study. The treatment plan comprised adherence to sleep hygiene measures, applying continuous positive airway pressure machine (CPAP) concurrently with eight sessions of weekly biofeedback therapy sessions. Standard over-night polysomnographic evaluations were done prior to and after the treatment. The present report comparatively highlights the patient’s sleep bioparameters, number of arousals, respiratory events, and periodic limb movements (PLM) during sleep stages in pre- and post-treatment studies. Prior to the intervention, the subject suffered from OSA, anxiety, minor depression, moderate quality of life and some degree of PTSD resulting in frequent episodes of sleepwalking associated with violence. After the intervention, there was a relative improvement in all indices. The apnea/hypopnea index (AHI) was 33.37 at the beginning of the intervention and decreased to 2.24 after 3 weeks of compliant CPAP therapy. The treatment protocol in this study resulted in complete improvement in some parameters such as PLM and OSAHS and relative improvement in others such as arousal instability and parasomnias including sleep walking associated with violence. The present study puts forward further insights into the possible relation between parasomnias and sleep disordered breathing with intermittent hypoxia. The above hypothesis deserves further investigations in future controlled studies.