Father of the Mumbai man, wanted by the police for urinating on an elderly woman on an Air India flight in November, today said his son hadn't slept for two days and termed the case against him a lie. He also hinted at a possible blackmail angle. The 34-year-old Shankar Mishra, who has been sacked by his company, is missing and a lookout notice or an airport alert has been put out for him as the police search for him.