A man who was wrongly arrested and beaten by Vancouver police in January has filed a lawsuit in B.C. Supreme Court, naming the two responsible officers, the City of Vancouver and the Corporation of Delta.

Yao Wei Wu, 44, was roughed up by two plainclothes Vancouver officers responding to a call about a domestic dispute in an adjacent suite on Jan. 21. Wu's left eye was swollen shut following the beating.

The Delta Police Department is investigating the incident, and charges have not yet been laid against officers Nicholas Florkow and Bryan London.

At a press conference announcing the civil lawsuit Friday, family representative Bill Chu read a statement from Wu's lawyer Cameron Ward.

"The Wu family is very dissatisfied with the investigation of this matter. They feel that charges should have been laid weeks ago and that the men who beat Mr. Wu up are receiving preferential treatment because they are police officers," Ward said in the statement.

The Wu family will not be seeking an investigation through the provincial Office of the Police Complaint Commissioner. However, the office has said will be monitoring the probe.

Chu said Friday that Wu is still having trouble with his vision after the assault. He also said that Wu's wife is suffering from post-traumatic stress disorder.

"She saw something that should not be seen by any housewife," he explained.

A community relief fund set up for the family has already collected more than $7,000 to support the wife and children while Wu, a carpenter, recovers from his injuries.