Brendan Mason died after being subjected to a horrific and prolonged attack, the court heard.
Two men, Keith Lowe and Joshua Hack, have pleaded guilty to the vulnerable 23-year-old's murder.
Lowe had denied murdering Brendan in Leicester's Abbey Park on July 5, but had little choice but to change his plea to guilty after new video footage emerged.
Read more: Facebook messages exchanged between killers before attack
