Police have identified the two remaining men who were shot to death in a string of fatal shootings that rocked the Lower Mainland this holiday weekend.

Investigators have confirmed that Surrey resident Apollo-Lyn Simpson, 28, was killed Tuesday morning in the 9500-block of 125 Street. He was the fourth victim in four days of murders that hit the Fraser Valley beginning on Christmas Eve.

A day earlier, 38-year-old Jeremy Olivier Bettan was shot to death in a Langley driveway.

Mounties were called to Bettan's home in the 9100-block of 207 Street Monday night to find him bleeding and unresponsive on the ground. He was lying next to an SUV with one door ajar and several bullet holes in the driver's side window.

Bettan was pronounced dead on the scene. He leaves behind a wife, two young sons and a teenage daughter.

Investigators have yet to make an arrest in the murder, but say they have found no link to gangs, drugs or organized crime.

The Integrated Homicide Investigation Team has said that Bettan did not have a criminal record, but CTV News has learned that he was known by police in his hometown of Montreal.

In 2007, he was charged with several counts including assault and uttering death threats. There has been no confirmation on whether he went to trial on those charges.

The spate of violent shootings that took down Bettan and Simpson are not related, according to police, and investigators have not connected any of them to drugs, gangs or organized crime.

Alok Gupta was killed while he worked a Christmas day shift at Ken's Grocery in Surrey, and Bradley McPherson was slain at a Christmas Eve house party.

There have been no arrests in connection to any of the shootings.