07/12/2013 04:09 EDT | Updated 09/11/2013 05:12 EDT

Ex-Mountie charged with shooting common-law wife breaks down in court

KELOWNA, B.C. - A former Mountie on trial for murder broke down several times as he recounted the events before he shot his common-law wife at their home in Penticton, B.C.

Keith Wiens testified the couple got into several arguments on the night of the murder in August 2011, saying Lynn Kalmring suggested he didn't love her because she was too old and overweight.

Wiens told the jury Kalmring came in and out of their bedroom several times, at one point spitting at him and turning purple.

The 57-year-old says it was the worst confrontation he'd ever had, even as a police officer.

Wiens says when Kalmring again left the bedroom he got out his gun.

He says she returned with a knife and he shot her in the face. (CKFR)