Teo was a frequent visitor of the Sammyboy Forum in the weeks leading to the killings, which government psychiatrist Derrick Yeo said casts doubt on whether he showed symptoms of depression.
The defence, relying on a report by private psychiatrist Jacob Rajesh, contended that Teo had MDD at the time and the condition reduced his mental responsibility for the killings. On the eve of the killings, Teo visited the online forum 132 times. Four days after the killings, he surfed the site 15 times - using Choong's phone.
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