AUDIO: "I think they have killed her." Howard Denby tells @JamieOwenBBC why he thinks his wife Carol chose to take her own life.

Howard believes his wife took her own life because doctors left a screw in her foot during, what he claims was a bungled operation. Carol was in constant pain, but Howard says the hospital refused to investigate the alleged rogue screw. After Carol was cremated, the undertaker found this screw in her ashes.