Hong Kong Police arrested a British expat and his Filipino wife after their 15-year-old daughter fell to her death from the 19th floor of their Repulse Bay apartment on Monday.

Businessman Nick Cousin, 57, an executive at international broker firm Jardine Lloyd Thompson, and wife Grace Garcia Cousins, 53, were accused of maltreating their 15-year-old daughter Bianca as investigations indicate the girl was unhappy with her life.

Like Us on Facebook

Police added that Bianca and her 14-year-old sister were not registered and did not go to regular schools but were instead home-schooled.

The two girls who were  born and raised in Hong Kong have no official identity documents, but a staff of a private hospital confirmed it had notified government authorities of their births in the mid-90s, South China Morning Post Hong Kong reported thursday.

Matilda International Hospital, the birthplace of the two girls, said they are not allowed to publicize hospital records for confidentiality reasons but assured the public that since May 2009, every birth at the hospital had been reported to the Immigration Department's Registry of Births and Deaths electronically on a daily basis.

Investigators are now questioning why the parents did not apply for the necessary documents for their daughters. The Immigration Department, for its part, said it will review all processes to avert a similar occurence.

Bianca was a member of the Hong Kong Pony Club and had been educated at a private tuition centre along with her younger sister, the Daily Mail UK reported.

Bianca's mother, Grace Cousins was also found to have overstayed her visa, prompting authorities to detain her and husband Nick for aiding and abetting her.

Grace Garcia Cousins worked as a domestic helper in Hong Kong in the 1990's before she and Nick Cousins, who is from Thurrock, Essex, began living together in 1994.

Reports say the couple had been watching TV at their apartment when Mrs. Cousins found out that her eldest daughter Bianca locked herself in the bathroom before  2 o'clock in the morning. They tried to open the door but Bianca already fell from the window and died.

The apartment's security guard heard the noice and found the dead girl at the building's foot.

Nick Cousins was released from jail April 7 to be with his younger daughter, while his wife Grace remained behind bars for further interrogation.  

TagsHong Kong, Repulse Bay, death, teenager, HK Teen Suicide