Records show the teen bought a knife several months ago with the plan of killing his entire family and burying the bodies in the backyard.
Incwadi efungelwe yokuboshwa kwakhe iveza ukuthi leli bhungu lathenga ummese ezinyangeni ezimbalwa ezedlule ngenhloso yokubulala umndeni walo bese izidumbu lizigqiba emuva kwendlu.