A 33 year-old engineer who murdered his girlfriend on Valentine's Day three years ago has been sentenced to death. High Court Judicial Commissioner Collin Lawrence Sequerah said the accused, Cheong Teik Keon, was found guilty of killing Tan Ching Chin, 24, a clerk, was accused of committing the offence against Tan at her home at No. 2703, Taman Hwa Seng, Jalan Rozhan, Alma, in Bukit Mertajam, Malaysia, at about 8.40am on Feb 14, 2013. "An email written by Cheong five hours before the incident showed that he was not of unsound mind, and I am unable to find the accused's mind so impaired as to not be able to differentiate between what is wrong and what is right. There is no other option in this case than to pass a sentence of mandatory death," he said in a lengthy judgement.