Angel Mou Pui Peng (; 9 July 1969 – 6 January 1995) was a 25-year-old female Macau resident executed in Singapore for drug trafficking.

After purportedly being recruited to work as a courier for a Hong Kong-based drug trafficking organization, Mou was arrested while in possession of over 5 kilograms of high-quality heroin during a stopover in Singapore's Changi Airport.

Despite vehemently protesting her innocence and stating that she was tricked into smuggling narcotics, Mou was found guilty at trial and sentenced to death. The circumstances of her arrest and execution were given wide coverage by the media, with many appeals being made by politicians worldwide for the commutation of her death sentence. However, the appeals, made by the President of Portugal and the Governor of Hong Kong among others, were ignored by the Singaporean authorities. Mou was executed on 6 January 1995.

Biography Born in Macau in 1969, Mou Pui Peng (who was later nicknamed "Angel") moved to British Hong Kong when she was 2 years old with her mother and younger sister. After dropping out of high school, Mou found various employment as a factory worker and a sales girl, and was working as a cashier the time of her arrest.

Background In the summer of 1991, Mou asked her 19-year-old sister Mei Mei if she would be willing to carry "something" from Thailand to Taiwan, hidden inside a pair of platform shoes. After she agreed, on 24 July 1991 they went to the Garden Restaurant in Sham Shui Po where they met two men, "Ah Hung" and "Peter". After the men decided they were suitable for the task, the sisters received HK$10,000 each in advance of their HK$50,000 fee for the trip. Ah Hung assured them that many people smuggled things by airplane each year, that everything would work out fine and that even if they were caught all they risked was a few years in prison. Before she left Hong Kong, Mou asked her 55-year-old mother Wong Siu-mui (Chinese: 黃小梅; Jyutping: wong4 siu2 mui4; pinyin: Huáng xiǎoméi) to pray to protector Buddhist deities in order to rid her of bad luck for her first trip abroad.

On 24 August 1991, after a final meeting with Peter at a restaurant in Jordan district, Mou and her sister caught a China Airlines flight to Bangkok. Ah Hung was waiting for them when they landed, and he then treated the sisters to a few days of sightseeing and shopping. Ah Hung then told them there was a change of plan: instead of high-heeled shoes they would be given false bottomed bags to carry, and that instead of Taiwan they would be going to Singapore and then onto Europe to deliver the goods. Mei Mei later said she thought they would be carrying contraband Rolex wristwatches to Amsterdam. That night, the sisters were split up and moved into different hotels, and the next day Mou was sent on a flight to Singapore.

After learning of Mou's arrest, Ah Hung re-routed Mei Mei's flight to Zürich via Seoul (without informing her of what happened to Angel). Mei Mei only learned of her sister's fate when she arrived back in Hong Kong from Holland and was met at Kai Tak airport by narcotics bureau detectives from the Royal Hong Kong Police.

Arrest at Changi Airport

Mou arrived at Changi Airport (to catch an onward flight to Zürich) at around midday on 29 August 1991, where her strange behaviour drew the scrutiny of Customs officer Suriati Mohamed, who was standing less than 20 meters away from Mou at the customs counter green lane. At baggage carousel number 17 on the west wing of Terminal 1, Mou picked up her duffel bag but then hesitated and dropped it, allowing the bag to go around another time before picking it up. Mou was also seen to be taking quick glances at the security arrangements of the different exits. Customs officer Mohamed then silently indicated to her colleague Rosli Brahim via eye contact that Mou had caught her attention. Customs officer Brahim also recognised Mou's bag as a similar type to what Poon Yuen Chung was carrying when she was caught the month before attempting to smuggle narcotics through the same airport.

After Mou put her bag on a luggage trolley and started wheeling it towards the exit of the Arrivals hall, she was stopped by customs officers Brahim and Mohamed, who asked Mou to open her bag for an inspection. Her nervous demeanour raised the suspicion of the officials, and after customs officer Mohamed inspected the bag she realized she could not run her hands down to the very bottom of its inside. Both officers then escorted Mou, who was becoming increasingly agitated, to the Customs Duty office where a more thorough search could be conducted. The officers used a key recovered from Mou to open a padlock on the bag, then the bag was emptied of all its contents and placed on a weighing scale, which showed an unusually heavy weight of 7 kilograms. After cutting through the bag's false bottom, the officers discovered 20 blocks of heroin, weighing approximately a total of 5.5 kilograms (with an estimated street value of $5 million). The plastic packaging of the larger compressed bricks were stamped with the "Double UO Globe" logo, which was known as a trademark of the Khun Sa drug trafficking organization.

Mou was then arrested and handed over to the Central Narcotics Bureau, led by officer Ong Peng Beng. When interrogated by officers at the scene about the narcotics discovered in her luggage, Mou mostly remained silent. However, she did state that the bag was given to her by someone else and she did not know what was inside. Mou was searched and found to have a large amount of cash in various currencies, amounting to $US3,000, HK$5,720, and S$1,055. She was then escorted to Tan Tock Seng Hospital for a medical check up, and afterwards gave a recorded statement to CNB officer Ong via a Cantonese interpreter at about 4:30pm. In her statement, Mou claimed that she paid for the bag at a roadside market in Bangkok and that it was later delivered to her hotel room by the same salesgirl she bought it off, who then helped Mou pack her things into the new bag.

Back in Hong Kong, Mou's mother heard a news report on the radio that a woman of her daughter's age, and with the same surname, had been arrested for drug trafficking in Singapore. Soon after she received a phone call to inform her that it was Mou herself who had been detained. On 30 August 1991, Mou was charged with the importation of the heroin discovered in her bag and then remanded in custody to await trial.

Trial

In the opening statements of Mou's trial at the High Court of Singapore on 2 March 1993, customs officer Rosli Brahim testified how Mou was one of the last passengers to retrieve her bag from the carousel, and appeared nervous by frequently looking at her surroundings, at the customs officers, and at the immigration officers. Customs officer Suriati Mohamed testified that she witnessed Mou looking alternately at the red and green customs channels, as if she was studying how the officers interacted with arriving passengers before making a decision on which channel to walk through. Mou was then stopped by officer Mohamed, who asked for her passport and then told her to open her bag. Suspecting the bag had a false bottom, they escorted her to the Customs Duty office and subsequently discovered the hidden drugs after cutting open the bag. Officer Brahim testified that the bag had a false bottom consisting of a round piece of plywood, which was covered by a thin lining of cloth. This cloth lining was wrapped around the blocks of heroin underneath, and the bottom of the lining was attached to the bottom of the duffle bag itself with a layer of glue.

Mou testified in her defence that she was a part time prostitute who was being paid US$1,000 per day for a long weekend in Bangkok, after which she was instructed by her pimp, a man named "Ah Hung", to visit Singapore to service a client. She claimed Ah Hung bought her a new canvas bag as a gift from a Bangkok market stall, then packed the bag without her knowledge while she was taking a bath in her hotel room, and he also carried the bag and checked it in for her at Don Mueang International Airport. Although Ah Hung was supposed to travel with her, she claimed an urgent matter arose in Bangkok he needed to attend to and he promised to catch a later flight then meet up with her in Singapore. Mou asserted that she had no knowledge of the drugs in her bag before she set off for Singapore. Defence lawyers also stated that the man known as Ah Hung had since been arrested by police in Hong Kong for narcotic offences and that his case was pending trial, a fact they asserted backed up Mou's testimony.

When challenged by Public Prosecutor Ismail Hamid as to why she had failed to mention any of these facts in her initial statement after her arrest, Mou claimed that she did but the recording officer left all those details out for some unknown reason, adding that she wished to disavow the contents of that statement. Mou further claimed that she only realised her statement was seriously lacking in details after it was read out in court, and she would have given a more detailed statement to the authorities before the trial commenced if she had known. In response to furter questioning about a handwritten note found in her possession which included the English words "SQ 46", "SQ28", "SWISS ZURICH", "CENTRAIR", "EUROPEAN TRAIN", "AMSTERDAM", Mou testified that a man named "Hor Fei" had telephoned the Bangkok hotel room while Ah Hung was away. After informing him that Ah Hung was not available he asked her to take a message, and she had scribbled down the words without understanding their meaning. Mou also claimed she was looking around frequently in the arrivals hall of Changi Airport out of curiosity as she had never been in Singapore before, and denied being stopped by the customs officers, insisting that she had voluntarily walked up to the customs desk to offer her bag for inspection.

Verdict

On 11 March 1993, Mou was found guilty as charged and sentenced to death for importing 4 kilograms of pure heroin into Singapore, contrary to Section 7 of the Misuse of Drugs Act. Trial judge Amarjeet Singh rejected her defence as "not credible". The judge highlighted the fact that Mou had failed to mention in her initial statement after her arrest many arguments she later raised in her defence at her trial, such as Ah Hung's name and her purportedly visiting Singapore to work as a prostitute, for which the judge drew an adverse inference from. Mou had also signed the initial statement after reading it and being offered the chance to make any alterations, which led the court to disregard her allegation it was not recorded correctly. Regarding Mou's claim to have never heard the contents of the initial statement before, the judge asserted that she would have been served a copy of it in remand prison during pre-trial disclosure of evidence, and it was unbelievable she would not have studied it in detail with her defence lawyers well before the beginning of her trial.