NEW DELHI, April 23 -- A 22-year-old woman was raped and strangled with a mobile phone charger cable at her home in south Delhi's Kailash Hills on Wednesday morning by a 23-year-old former household employee who apparently gained entry after exploiting a narrow window when her parents had stepped out as part of their daily routine, police said. "The suspect, Rahul Meena, was apprehended in the evening from a hotel in Dwarka," said Vijay Kumar, joint commissioner of police, southern range. "A case has been registered on charges of rape, murder, and robbery, among other sections," Kumar added. Meena hails from Rajasthan's Alwar, where he was wanted for sexually assaulting another woman last night, police said. The victim, an IIT graduate who had been preparing for the civil services examination, was found by her parents when they returned from the gym at around 8am. Her father is a civil servant; her mother, a dentist. Her 25-year-old brother lives and works in Mumbai. "Initial questioning suggests the motive was rape-robbery but it may also be revenge since the family sacked him," an officer said, asking not to be named. Meena was employed by the family for roughly 10 months before being dismissed two months ago - over concerns about an addiction to online gaming and a habit of borrowing small sums from neighbours, the officer said. The family had hired him on the reference of a colleague of the victim's father; no police verification was carried out before he was taken on, the officer said. The victim's father, in his complaint to police, described how their worst fears came true after returning home. The family's car cleaner had been on the premises that morning; when the couple returned, he told them their former domestic help had come by. "He said when he asked him why he was here, he just rushed," the complaint read. The parents took the lift up. Near the entrance, there was blood. Police said CCTV footage placed Meena entering the house at 6.39am, approximately 40 minutes after the victim's parents had left. He was seen leaving at 7.22am, exiting to the right of the building, carrying a bag and having changed his trouser and shoes, they added. The locker in the parents' bedroom had been forced open; the room was ransacked. Police said he fled with cash and valuables. Some portion of the Rs.2-2.5 lakh he stole had been recovered upon his arrest, joint commissioner Kumar said later. Kumar added that Meena likely entered the residence using a smart key that is kept hidden away for another domestic help to enter. "He was aware of the location of the key and used it to unlock the locked door," he said. Meena was aware of the couple's routine and the placement of the key, police said. Investigators found blood in multiple locations inside the apartment. "We suspect that the victim was physically assaulted first in her room, hit with a stick-like article on the head, dragged down the flight of stairs, and then assaulted on the third floor as well. He raped her as well," a senior police officer said. The parents told police they found their daughter on the floor of their bedroom naked and bleeding from the head. They dressed her, wrapped her in a bedsheet and drove her to Fortis Escorts Heart Institute in Sukhdev Vihar, where she was declared dead on arrival. Police were notified at around 9am....