Goh was charged with the murders of his grandmother and mother and currently, he is detained indefinitely under the President's Pleasure due to him being of drug-induced unsound mind at the time of the offences.
[1][2] On the night of 27 October 2019, at around 7.24 pm, residents were alerted to a commotion happening at the ground floor of a HDB flat block somewhere at Commonwealth, with a group of people shouting and screaming.
[6][7] On 28 October 2019, the 22-year-old suspect, identified as Gabriel Lien Goh, who was still suffering from fresh injuries, was taken to court where he was officially charged with the murder of his 56-year-old mother Lee Soh Mui.
Her caring mentor figure was highly regarded by her former students, who published tributes on Facebook upon receiving news of her death.
[17] A news report also revealed in late January 2020 that four months prior to the alleged murders, Goh was a victim of a past assault incident.
One of Goh’s assailants, 20-year-old Muhammad Raushan bin Nishan, was found guilty of voluntarily causing hurt, and was sentenced to reformative training for the crime in the same month.
[18] On 11 November 2021, Gabriel Goh, who remained in remand for the murders, was first brought to court for a total of six charges of illegal possession and consumption of drugs.
However, the prosecution sought an acquittal on the culpable homicidal charges against Goh, as the psychiatric report showed that Goh suffered from acute hallucinogen intoxication at the time of the killings and hence was of substantial unsound mind when he committed the murders of his mother and grandmother, since his consumption of LSD caused him to experience illusions, hallucinations and paranoid delusions at the time of the offences.
Goh was thus acquitted of his charges and the judge Valerie Thean sentenced him to indefinite detention under the President's Pleasure, a type of sentence given to mentally unsound offender's charged with whichever crimes (including murder) and such a detention meant the offender will be detained indefinitely until such time he was fit for release.