New Delhi: The 22-year-old daughter of a senior bureaucrat was sexually assaulted and murdered at her south Delhi home on Wednesday. Police said her head was crushed with a heavy object and she was strangled with a mobile phone charging cable.Police arrested the 23-year-old man from a hotel in Dwarka within 12 hours of the crime. The suspect is a former domestic worker who was fired for “financial misconduct” six weeks ago. Police said, he had returned to steal.The suspect ransacked the victim’s house and fled with Rs 2.5 lakh in cash and some valuables. Joint CP (South) Vijay Kumar said a case of rape, murder and robbery has been registered against the suspect. Police said it was not verified.The incident happened around 6.40 in the morning. At the time of the crime, the woman’s parents had gone out for morning exercise. Joint CP Kumar said, “Her parents had gone for their gym session. A spare key was left outside the flat for the house help, who usually came around 6.30-7 am.” The suspect was aware of the family’s daily routine as well as the location of the keys. An officer said, “He entered the house and attacked the woman while she was studying. After asking for the passcode of the cupboard, he attacked her with a blunt object and later strangulated her with a cable.”The family told police that when they returned home at 8 am, they found their daughter lying in a pool of blood. He was bleeding profusely so they took him to Fortis Hospital. Police were later alerted by the family from the hospital.The suspect remained inside the house for about 40 minutes, with CCTV recording his entry at 6.39am. They searched the cupboards and safes and put the cash in a bag. After the crime, he changed his clothes and was captured on CCTV leaving the house at around 7.22 am and walking peacefully on the road with the bag.A security guard at the colony said that another domestic help, who was cleaning the car at the time, saw the suspect coming out of the victim’s house and stopped him. “He asked her why she was in that area and asked her to wait and get something to eat. In response, the suspect said he had urgent business and left,” the guard said.After the crime, the police formed several teams, analyzed footage from over 100 CCTV cameras and later traced him to the hotel he had stayed in in Dwarka area. The police will produce the suspect in the court on Thursday and will seek his police remand for questioning regarding the motive of the robbery and recovery of valuables.According to police, the suspect was recommended as a domestic help by a colleague of the woman’s father about a year ago. Later the co-worker was informed about his vices and his gambling addiction, after which the father let him go. The suspect also had a habit of borrowing money from people and misusing the money given for household expenses.DCP (Southeast) Hemant Tiwari said, “We have collected strong evidence in the case and will build a strong case against the suspect so that he gets strict punishment as prescribed in the law.”