Zack Coughlan, 23, killed Jamie Collins, 21, in garden of home they shared and initially denied murder
A university student who lay in wait for his housemate to return home before stabbing him 30 times has been jailed for life with a minimum term of 28 years.
Zack Coughlan, 23, dressed in black and wore a mask and gloves to ambush Jamie Collins, 21, in the garden of their home in Filton, South Gloucestershire.