HYDERABAD: Investigation into the cold-blooded rape and murder of an Indian-American teenager , with roots in Hyderabad, revealed that the accused, Donald Thurman , stalked and catcalled her, but the honours student of University of Illinois , Chicago, rushed to her car in a garage on the campus.Angry as he was, Thurman, who resided near the university but was not connected to it, went behind her, held her tightly by the neck, dragged her into her car's back seat and sexually assaulted her, police said.The crime took place around 1.35am on November 23. While Thurman confessed to the murder, he told police that he did not have sexual intercourse with her, though a used condom was found in the victim's car itself.On November 26, Cook County Assistant State's attorney James Murphy gave a detailed account of the crime, narrating how Thurman had sexually assaulted the victim after she fell unconscious.The body of the victim was found face down in the car's back seat when family and police reached the spot on November 23 morning. Police suspect that Thurman had used the condom and disposed it in the car before running out of the garage.The victim had attended a semi-official event for health fraternity students and another student had accompanied her to the garage up to a point. From there, the student went to her dormitory while the victim walked alone to the garage. The other student has been named as a witness in the case."The victim walked past the blue line and the defendant noticed her. The defendant thought she was petty and tried talking to her but the victim ignored him. The defendant followed the victim and tried to talk to her again. The defendant catcalled at her. The victim continued to ignore the defendant and kept on walking to where her car was parked," Murphy said."The defendant was angry that he was being ignored," Murphy said about Thurman, who then grabbed her around her neck from behind and put her in a 'chokehold'. The girl fell to the ground and Thurman dragged her, opened the backseat door, put her there and committed the crime, he added.In the morning, when the victim's sisters traced her to the garage, along with police and university officials, they tried to resuscitate her, but she was unresponsive and later paramedics declared her dead.Police, who got an idea about how the accused looked like from the footage of a CCTV camera near the garage, realized that he had used the public transport to escape. They expected him to show up there as that seemed to be his regular route. When the accused did turn up there the next day, he was arrested. He has been charged with first degree murder and aggravated sexual assault