A 21-year-old lift technician was arrested for allegedly raping a girl in an residential society in Gurgaon's DLF Phase 2, a police official said on Wednesday. On Monday, Arun Sharma, a resident of Sonepat, took the 14-year-old girl to the roof of the building after promising to give her a gift and then raped her, he said. The accused was working as a lift technician in the building and he knew the girl and her mother, the official said.