"get him" in the showers.
The 52-year-old claimed he strangled the 20-year-old by accident during kinky sex – at her request.
The reclusive bookkeeper begged the court for protection after overhearing inmates plotting to bump him off in the same way.
Samuel Stein QC, defending, told Mr Justice John Saunders: "By the time he got back to the prison it was just after the news reports had been broadcast.
"From the response from other prisoners he asked to go into his own cell and to be shut in.
"The doors you can hear through and talk through.
"He himself was threatened with strangulation – that they are going to
"get that sick b****** in the showers"."
He continued: "He tried to hold up some paper against the pane in the wall to prevent people seeing him.
"He has spoken to the night watchmen – and that"s meant he hasn"t slept.
"The level of threat is very serious."
Tenniswood will face a lot more sleepless nights after a jury saw through his lies.