William Sandeson's former girlfriend testified Monday at his first-degree murder trial about the night Taylor Samson disappeared.

Sandeson is accused of killing Samson, 22, in a drug deal at Sandeson's apartment in south-end Halifax on the evening of Aug. 15, 2015. Sandeson was 23 at the time. 

This is the second time Sandeson has faced a trial on this charge in Nova Scotia Supreme Court. A new trial was ordered in 2020 after a verdict from a trial in 2017 was overturned on appeal.

Sonja Gashus te…