Li Mingzhu, a flight attendant from Zhengzhou, Henan Province, was allegedly killed by a driver named Liu Zhenhua who offered her a ride via the Hitch service on China's biggest car-hailing app, Didi Chuxing, on May 5. According to Li's father, Li had hailed Liu's car just before midnight to take her home from the airport, but she never arrived. Police found Li's body dumped in wasteland. She was allegedly raped before being stabbed to death. Liu was identified as a major suspect, but his body was found in a local river several days later. He is suspected of killing Li before committing suicide. According to media reports, Liu's driving license had been revoked, and he had used his father's license to register with Didi Chuxing. He was also reported to have taken medication for long-term depression. The lapses in security triggered wide public concern over the security of online cab-hailing services which are often criticized for poor vetting of their drivers.