WETASKIWIN, Alta. — Prosecutors are focusing on bullet patterns during closing arguments at the trial for a man accused of attempted murder in the shooting of two Alberta Mounties.

Sawyer Robison’s (ROH’-bih-suhns) defence lawyer has argued that it was Robison’s uncle who shot the officers before killing himself.

But the Crown says bullet patterns are so erratic there had to be a second shooter.

The Crown is also pointing to evidence found on Robison’s computer, including one document with the heading: When Is It OK to Shoot a Cop?

Constables Sheldon Shah and Sidney Gaudette were wounded while trying to search a farmhouse near Killam, southeast of Edmonton, in February 2012.

The defence notes there’s no forensic evidence that links Robison to using either of two guns found in the home and the officers both testified that Robison was not armed when they entered the farmhouse.

The Canadian Press