Four years on, the brutal murder of real estate agent Lindsay Buziak still brings the same emotions to the surface - among them anger and frustration.

Anger because the killing seems so senseless. She was a 24-year-old just doing her job, showing a house to two people who had told her they wanted to see it. After luring her to the house, they attacked her in an upstairs bedroom. A promising young life was ended by multiple stab wounds.

Frustration because after four years, we still don't know why Buziak died. Why did she become the victim of what appears to have been a targeted hit? Who did this to her?

Saanich police have received thousands of tips, but they say they still have no suspects. We can only hope that they are making progress behind the scenes, because on the surface they are no closer to solving the case than they were on Feb. 2, 2008, the day Buziak died. The case has gone unsolved even after the offer of a $100,000 reward for information leading to an arrest, and after a Dateline NBC special that was watched by millions of people across North America.

Family members and close friends have been left to wait and wonder. Many of them took part in a memorial walk for Buziak on Thursday, a moving vigil that started at Royal Oak Burial Park and went past the house where she was murdered.

As Jeff Buziak, the murder victim's father, says: "It's a reminder that this happened in the community, it's a reminder how dangerous it can be and a reminder for safety for women."

The unsolved Buziak case is a reminder of the importance of the Vancouver Island Integrated Major Crime Unit, an Island-wide homicide team made up of investigators from Victoria and the RCMP. When the team was formed in January 2008, Saanich chose not to take part.

Last year, Saanich agreed to join the homicide team, but the details have not been worked out yet. As a result, Saanich police are not yet able to take full advantage of a valuable tool in their fight to bring killers to justice.

Yes, there is co-operation between police departments, but there are plenty of examples - Robert Pickton being one of the most notable of them - to prove that co-operation is not as effective as full integration.

There is no way to know whether membership in the major crime unit would have helped Saanich solve the Buziak case. But it would not have hurt.

Let's hope that Saanich and the major crime unit implement their new relationship soon. The more resources that can be brought to bear on a case such as the Buziak killing, the better the chances of solving the crime.