Gatineau police say they need the public's help to find knives possibly used to kill a young mother and her parents in Aylmer, Que.

Shakti Ramsurrun, 28, faces three counts of first-degree murder after three people were found dead in an Aylmer home on May 24.

A court sketch of Shakti Ramsurrun, who faces three counts of first-degree murder in relation to the deaths of his estranged partner, her mother and her step-father. (Laurie Foster-McLeod/CBC)

Police now say the deaths of Anne-Catherine Powers 21, her mother, Louise LeBoeuf, 63, and LeBoeuf's partner, Claude Lévesque, 58 happened overnight between May 23 and 24.

Police also say they believe Ramsurrun might have left evidence such as clothing or weapons near la Petite-Nation, Que., north of Gatineau. They also say knives found at the home might not be the murder weapons.

Police are now asking anyone who was in the west Quebec area on May 24 and saw a red wine-coloured Pontiac Montana van with the Quebec license plate 302RVM to call police at 819-243-2346, ext. 6677.

Accused, victims lived together

Police and neighbours said the accused, the three victims and a 15-month-old child lived in a suburban home at 64 Félix-Leclerc St., where the bodies were found. Powers was Ramsurrun's estranged girlfriend, according to police.

This Pontiac Montana van is owned by the accused and police believe it was driven north of Gatineau to drop off evidence. (Photo courtesy of Gatineau police)

Ramsurrun was born in Mauritius, a small island off the east coast of Africa.

Const. Pierre Lanthier, a police spokesman, has said Ramsurrun became a permanent resident of Canada in 2011. Lanthier referred to Ramsurrun as an ex-boyfriend, not a husband.

He said police did not know of Ramsurrun and they had never been called to the home for any prior incident.

The accused also worked at the Rivermead Golf Club near the crime scene, which is where he was arrested.