Singh was arrested on August 11, 2011. During the investigation, Parminder confessed that he had developed a relationship with Mandeep on the pretext of marriage. On August 9, 2011, he had taken the girl to the Khanpur park near Kharar. Mandeep wanted to marry him, but he did not. Therefore, he took her to the Ropar canal at night and pushed her in the canal with the intention of killing her.