The RCMP in Newfoundland says it has asked the Halifax Regional Police Services to conduct an independent review into how a man involved in a week-long standoff with Mounties managed to get away even when they had his house surrounded.

The Mounties say a Bay Bulls, N.L., man who had been barricaded in his house since Dec. 4 was able to sneak past officers shortly before 9 p.m. on Friday night, shortly after water began being pumped into his home.

The suspect was arrested Saturday afternoon about 18 kilometres away from the scene.

Leo Crockwell of Bay Bulls, N.L., faces 16 charges, including five counts of attempted murder, assault with a weapon, assault, uttering threats and various firearms offences.

The Mounties say they now know, after reviewing RCMP video, that the suspect fled the house by a side window. It is believed he later caught a ride with a Bay Bulls resident to a residence in Petty Harbour Saturday morning.

The Mounties surrounding the house didn't realize the man was no longer in the home until he was arrested in Petty Harbour.

In a statement, the Mounties say they've asked Halifax police for an independent review into all aspects of their "tactical and critical incident response."

The standoff began when Crockwell's sister went to police on Dec. 4, alleging her brother had pointed a gun at her and assaulted her.

The man barricaded himself in the house and police said he was armed with a shotgun and two rifles. Police quickly surrounded the home in Bay Bulls, but the man refused to talk to them.

For days, police tried to communicate with the man; they even sent in a robot to deliver their messages. Police say the suspect allegedly fired a shotgun at the robot on more than one occasion.

On Dec. 8, police tried to use tear gas to force the suspect from the home. They also cut power to the house, disabled the suspect's vehicle, used pepper spray, distraction devices, and stun grenades in an effort to make the home "uncomfortable in as many non-lethal ways as possible."

But the man stayed put and allegedly fired at police twice. On Friday, police began pumping the water into the house.

Crockwell is due to appear in court Tuesday for a bail hearing.

With files from The Canadian Press and a report from NTV's Carolyn Stokes