Employers and domestic workers' groups said differing expectations and misunderstandings about housework standards were the most common causes of conflict between employers and domestic helpers. 'This is a very unfortunate, uncommon, and isolated case,' Employers of Overseas Domestic Helpers Association chairman Joseph Law said after the arrest of a Filipino helper suspected of killing her employer. The case was the first suspected murder involving an employer and a domestic helper he had heard of in 30 years, he said. Employers should inform domestic helpers of their expectations, in relation to housework, on their first day on the job, Mr Law said. Often inexperienced employers expected workers to take over all housework on arrival, which was impossible because it took time for two parties to understand each other. Migrant workers' groups advised domestic helpers to ask for an explanation if they found it difficult to fulfil their employers' requirements. Dialogue was encouraged as they came from different cultures but needed to live in the same house, Mission for Migrant Workers director Cynthia Abdon-tellez said. Some helpers had to pass medical and psychiatric tests conducted by agencies, Ms Abdon-tellez said. 'From a conversation with a migrant worker, an employer can have a better understanding of a worker and his or her psychological status,' Mr Law said. If a worker was psychologically unstable, an employer could consider terminating their contract. Both employers' and workers' groups called for talks on how to prevent another tragedy.