No one was immediately taken into custody. The sheriff's office had ``some suspect information,'' Lewis said at the press conference, but wasn't sure if there were multiple shooters.

However, the minister said he expects an announcement some time this month.

The senators say that even though provincial Justice Minister Mark Furey confirmed on June 3 there would be some kind of joint review or inquiry, nothing has happened since then.

The RCMP are unable to share what, if anything, was done with a tip about the man, who shot and killed 22 people in rural Nova Scotia in April.

Acquaintances and former neighbours have described the 51-year-old killer as a clever and manipulative millionaire who would threaten harm to his spouse's family, control her money or cut off her means of escape by removing the tires from her car or blocking the driveway.

Domestic violence is being examined as a key aspect of the mass shooting.

'Many residents are suggesting ways we could memorialize Constable Heidi Stevenson who lived in Cole Harbour,' says the local councillor.

Relatives of Const. Heidi Stevenson say they also wanted to thank her extended RCMP family.

Greg and Jamie Blair were two of the 22 people killed on April 18 and 19 during a shooting that happened in five rural Nova Scotia communities.

The Mounties have said little about possible motives behind one of the worst mass killings in Canadian history. But experts say police could use an unusual tool to help them find answers.