Matrosov, 35, whose daughter was a victim of Svirdov, has been freed from jail early after just six months. Matrosov is pictured with his wife Natalya Matrosova and his two daughters.
Vyacheslav (Slava) Matrosov, 35, was jailed for 18 months but now has been allowed home a year early.
There was a wave of sympathy in Russia for the father who forced child sex abuser Oleg Sviridov, 32, to dig his own grave in a forest.
Matrosov, 35, whose daughter was a victim of Svirdov, has been freed from jail early after just six months.
Oleg Sviridov (left) and Vyacheslav Matrosov (right) were friends prior to the incident. Matrosov said he discovered evidence of his friend's alleged crimes while they were drinking together
Sviridov had repeatedly sexually abused Matrosov's daughter, then aged six.
Upon being released from prison early, the father posted a picture with his wife Natalya, 35, with the words: 'Home. Love very much.'
Matrosov was initially held on suspicion of murder but this triggered a public outcry in Russia.
In April he was convicted of 'inciting' his friend 'to suicide' by Krasnoglinsky Court in Samara, and sentenced to 18 months in a strict Russian penal colony.
The close friendship broke down when the father found sickening and graphic footage on his friend's mobile showing Sviridov forcing his daughter to perform a sex act on him.
Matrosov, 35, forced his former best friend to dig his own grave in the Samara region of Russia
Matrosov, a former rocket engine factory worker, could have been jailed for 15 years if he had been charged with murder.
There was a wave of public support in Samara region for Matrovov after he was linked to the killing of paedophile Sviridov, and the case was highlighted around the world.
Locals in village Pribrezhnaya raised money for his initial legal fees.
A petition signed by 2,500 people demanded that he should be fully acquitted.
They supported him for 'saving our children by ridding us of a child sex attacker'.
Prominent TV journalist and former Russian presidential candidate Ksenia Sobchak told her followers: 'All parents are standing up for the paedophile's killer.'
Miss Sobchak - aka Vladimir Putin's 'goddaughter' - has now fled abroad after she risked arrest and jail in the latest Kremlin media crackdown.
Comment: Oh give it a rest, if she was 'Putin's goddaughter', why has she had to flee abroad?
Matrosov was charged with 'inciting a person to suicide... by threats or abuse'.
Sources close to the case said that detailed forensic evidence showed that Matrosov had not stabbed Sviridov in a forest where the dead man's body was found later in the makeshift grave.
There are claims Sviridov was given an ultimatum to go to the police and confess to sexually abusing the girl, or face the father's wrath.
A relative said Sviridov was seen badly beaten on the day he disappeared in September 2021, more than a week before his body was found in the makeshift grave near Vintai village.
Two other children are feared to have been abused by Sviridov.
Comment: It seems that there are numerous incidences where, increasingly, justice is getting a hearing on our planet. And one can imagine that many Westerners would appreciate such reasonable judgements to be doled out in their own communities, rather than the lenient sentences for paedophiles and child rapists that have become so commonplace.