Detective Chief Inspector Ceri Hughes of South Wales Police described 63 year-old David Evans as a "gentle and trusting man".
She also paid tribute to Mr Evans' family saying they had shown "tremendous dignity" following this "brutal" murder.
The family of David Evans who was murdered at his home in January say they hope his death will "serve as a warning" to others who meet strangers over the internet.
Richard Evans, Mr Evans’s son, said he was a "gentle and loving father, brother, uncle and grandfather" and the "violent and needless manner" in which he died has "devastated" the family.
On Monday, a teenager from Abercynon, near Pontypridd, was found guilty of murdering the 64-year-old widower in his own home in Pentyrch. Bleddyn King is due to be sentenced on Tuesday.
Mr Evans said his father met King over the internet: "I hope will serve as a warning to others who meet strangers in this way.”
A teenager has pleaded not guilty to the murder of a man whose body was found after a fire at this home in Pentyrch.
Bleddyn King, 19, of Abercynon Road, Abercynon, denied murder in a short hearing at Cardiff Crown Court today.
64 year-old David Evans was found dead by fire fighters who attended a blaze at his house in the village of Pentyrch, on the outskirts of Cardiff in January.
Mr King was remanded in custody and will stand trial at Cardiff Crown Court in October.
A teenager charged with the murder of a 64-year-old man is due to stand trial later this year.
The body of David Evans was found after a fire at his home in Pentyrch, near Cardiff, in January.
19-year-old Bleddyn King, from Abercynon, appeared at Cardiff Crown Court today. He has yet to enter a formal plea but a trial date has been fixed for October 2.
An 18-year-old man has appeared in court charged with the murder of a man whose body was found in his fire damaged home.
David Evans, 64, was discovered by firefighters in the village of Pentyrch, on the outskirts of Cardiff, in January after they extinguished a blaze at his one-bedroom bungalow.
Bleddyn King, 18, of Abercynon, appeared at Cardiff Crown Court today charged with murder.
King, who appeared by video link, did not enter a plea and there will be another hearing on May 21.