The other inmate fell but Selenski shimmed down the makeshift rope to a second-story roof and used the mattress to scale a razor-wire fence , Fischi said .
The other inmate fell but Selenski shimmed down the makeshift rope to a second-story roof and used the mattress to scale a razor-wire fence , Fischi said .
After the other inmate fell , Selenski used the mattress to scale a 10-foot , razor-wire fence , Fischi said .