Police were called to the address in Ashington in the early hours of this morning, where they found the 20-year-old man with stab wound to the chest.
Three people have since been arrested on suspicion of wounding, and police are appealing for information about the incident.
The man is reported to be a in a critical but stable condition.
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A Domestic Homicide Review is now set to be carried out after Bennett murdered his current and ex partners
The cadets are visiting over 300 homes in Wallsend to deliver leaflets and give residents crime prevention advice on their doorstep.
Alan Bennett killed Jodie Betteridge in front of her three children Teesside Crown Court heard. He had earlier killed partner Lynne Freeman