Man, 29, faces manslaughter and 12 other charges for alleged killing at Hong Kong hotel, date rape and theft

A revised indictment accuses Au of drugging six men, including the one who died, to either rape them or steal their belongings.

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He allegedly killed the deceased, identified in court only as C, at the Best Western Plus Hotel in Tsim Sha Tsui on March 14 last year.

Au was said to have given the man a mix of gamma-hydroxybutyrate (GHB) and gamma-butyrolactone (GBL), both date rape drugs, as well as tadalafil, an anti-impotence substance. He also allegedly stole a mobile phone from him.

The accused reportedly targeted the remaining five at three other locations on the Kowloon peninsula between March 7 and 15 last year.

He allegedly raped two of the five men while they were unconscious.

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The marketing manager also allegedly stole four mobile phones, a watch, a ring, a pair of earphones, 4,000 yuan (US$557) and HK$1,200 (US$154) from three of them during the encounters.

Au is facing one count of manslaughter, one of using a noxious substance with intent to injure, two of administering drugs to obtain or facilitate an unlawful sexual act, two of buggery without consent, three of using a substance with intent to commit an indictable offence and four of theft.

The defendant did not ask for bail during the hearing before Magistrate Peter Yu Chun-cheung.