Jordan Carter, 18, died of a stab wound to the leg near his home on 23 February.
Robbie Lea died swimming back from an island on a lake, a court heard.
Inspectors at HMP Woodhill found "chronic" staff shortages and vulnerable inmates being failed.
The hungry and whiffy moggy could have been stuck for two days before it was spotted, rescuers say.
Archaeologists also discovered a skeleton and the remains of a Saxon house at the site.
MK Dons sign Exeter City captain Jordan Moore-Taylor on a free transfer after the defender activated his release clause.
Wycombe Wanderers re-sign goalkeeper Ryan Allsop on a three-year contract after his release by Bournemouth.
Welwyn and Hatfield Times
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