Student lay in wait for housemate before stabbing him 30 times, Bristol court hears

<p>Zack Coughlan is accused of murdering Jamie Collins, who he studied with at the University of the West of England</p><p>A university student lay in wait for his housemate to return home before stabbing him 30 times, a murder trial has been told.</p><p>Zack Coughlan,