Some experts are citing a conflict of interest surrounding the investigation of a Calgary mass murder that left five young people dead.

The man charged in the case, 22-year-old Matthew de Grood, is the son of veteran Calgary Police Insp. Doug de Grood.

Bill Pitt, a criminologist at Grant MacEwan University, told CTV News that the case is "too close" to the Calgary Police Service.

"You've got a high-ranking Calgary Police Service officer whose son is involved with one of the country's most egregious mass murders," Pitt said.

Since it’s such a high-profile case, Pitt said "all of the optics have got to be correct."

Ian Savage, president of the Calgary-based Criminal Defence Lawyers Association, said another police agency should take over the investigation.

"You have the RCMP or the Edmonton Police Service take over the case, very simple" he said.

However, Calgary police have assured the public they could carry out the investigation.

"Certainly the cornerstone of our profession is to investigate matters like this without favor or bias,” said Calgary Police Service spokesperson Kevin Brookwell during a news conference earlier this week. "Everybody realizes this is the biggest mass homicide in Calgary's history."

Meanwhile, prosecutors from Edmonton are being brought in to handle the case in court.

De Grood faces five counts of first-degree murder. He is expected to appear in court on Tuesday.

With a report from CTV’s Janet Dirks