The body of Kyle Patrick Walley was found by police just after 5pm on Sunday when they were called to a home in Eglwysfan, in Rhosymedre, Wrexham.
His family has now released a poignant tribute, saying he had been looking forward to starting an apprenticeship in September.
“Kyle, you were just 19, with your whole life ahead of you, our boy; you were caring, loving and kind.
"You made us laugh, made us smile, you had so much to look forward to: college apprenticeship in September and so much more.
“We are absolutely devastated. You will be greatly missed by so many, you had the biggest smile and sense of humour; all the love in the world from Mum , Dad, Lee, Johnathan, Caitlin, Nanna, Aunty and everyone who knew you.”
Officers from North Wales Police have arrested an 18-year-old on suspicion of murder. He remains in custody.
Footage, described as disturbing, has appeared on social media. North Wales Police and and Wrexham Council say they were working together to ensure anyone affected by the tragedy would be able to access emotional support.
Detective Chief Inspector Alun Oldfield said: “I would like to offer my condolences to Kyle’s family at this extremely difficult time.
“The circumstances surrounding this incident have been the subject of widespread social media speculation, and we are aware that many young people may have been affected by this. As such, School Liaison Officers and the Neighbourhood Policing Team are working closely with colleagues at Wrexham Council to offer the appropriate support and reassurance to the local community.”
"If you have any information that can assist us, you can contact the Investigation Team directly at orlo.uk/76CY7."
A spokesperson for Wrexham County Borough Council added: “Children’s Social Care and the Education department in Wrexham have proactively discussed the need to support any children and young people who may be affected by this tragic event.
"Education and social care staff will offer emotional support to children or young people when required.”