THE Junior Police Officers Association (JPOA) said yesterday the jail sentence of six fellow officers found guilty of assault charges was unfair and would adversely affect morale. Speaking after an emergency executive committee meeting, JPOA chairman Chui Wai-chun said they resented the heavy sentence. The six Kowloon West Emergency Unit policemen were convicted of either common assault or assault occasioning actual bodily harm to two customs officers and a decorator. They were sentenced to between three and seven months' imprisonment last Friday, with one given a suspended term of a year. Mr Chui said they would fully back an appeal. ''We are concerned that criminals may take advantage of the court ruling and use dirty words to insult the officers in order to get away with their crimes,'' he said.