Dad-of-two Matthew Farmer was jailed for life after he stabbed his estranged partner 21 times and tried to strangle her after lying in wait in her garden.
His sentence for murder was life imprisonment with a minimum tariff of 29 years to serve before a parole application can be considered.
For the officer in the case, Detective Inspector Rebecca Hodgman, of Nottinghamshire Police, there really are no words to describe what Farmer did to Stacey Clay, a 39-year-old mother-of-four who had broken off her relationship with him.
Farmer repeatedly contacted Miss Clay after the break-up and harassed her before hiding behind a barbecue in her garden and launching the knife attack when she went outside for a cigarette.