Their victims include partners, children and babies and strangers who were unlucky enough to cross their paths.
Three of the defendants were responsible for the murders of two young babies.
Another killed a Chesterfield dad outside the Crooked Spire in a late-night town centre attack.
Another killed a Chesterfield dad outside the Crooked Spire in a late-night town centre attack.
![Stepdad Crouch was jailed for 28 years minimum for the murder of baby Jacob Crouch.
Ten-month-old Jacob Crouch died in his cot on December 30, 2020 due to suffering an injury that was most likely caused by a kick, stamp or punch.
In previous days, weeks and months his ribs had been broken in 41 places on at least four separate occasions.](https://www.derbyshiretimes.co.uk/webimg/b25lY21zOjdiZjNjNDQ2LThmYWQtNDJkNy1hY2MyLTMwNGYxNzMzMjgwZTpmOWI0ZTkwZS1jZDc4LTRjYzMtOWMxMi04YzRjZWVkOGFhZTg=.jpg?crop=3:2&width=373)
5. Craig Crouch
Stepdad Crouch was jailed for 28 years minimum for the murder of baby Jacob Crouch. Ten-month-old Jacob Crouch died in his cot on December 30, 2020 due to suffering an injury that was most likely caused by a kick, stamp or punch. In previous days, weeks and months his ribs had been broken in 41 places on at least four separate occasions. Photo: Derbyshire Police
![Iyayi, 46, was jailed for life for stabbing his wife to death in their Derbyshire home – after taking drugs he bought from the dark web. After his arrest at a house in Oak Crescent, Littleover, Iyayi told officers he could not remember what had happened. Commenting on the case, Detective Inspector Steve Shaw said: “Katy Harris was a much-loved mother, daughter, friend and teacher. “Her death was a tragic loss of life for her loved ones, as well as the hundreds of students whose lives she had touched through her work as a teacher."](https://www.derbyshiretimes.co.uk/webimg/b25lY21zOjA3OTRhMWZlLWUxYjItNDE2NS1hMmY1LWNkNDE5MWMyMmY0ODoyNDM5ZmZkMi1mMGYxLTQzZTUtODE2OS1lNTU1ZWE1ZWVkYTg=.png?crop=3:2&width=362)
6. Conrad Iyayi
Iyayi, 46, was jailed for life for stabbing his wife to death in their Derbyshire home – after taking drugs he bought from the dark web. After his arrest at a house in Oak Crescent, Littleover, Iyayi told officers he could not remember what had happened. Commenting on the case, Detective Inspector Steve Shaw said: “Katy Harris was a much-loved mother, daughter, friend and teacher. “Her death was a tragic loss of life for her loved ones, as well as the hundreds of students whose lives she had touched through her work as a teacher." Photo: Derbyshire Police
![Hall, 36, was jailed for life with a minimum of 17 years in custody for the murder of his former partner Sarah Henshaw. Derby Crown Court heard how Hall, who denied the murder, dumped the Ilkeston woman's body in a lay-by hours near Chesterfield just hours after her death. He spent the days which followed "covering his tracks" trying to make it appear as though she had simply left home.](https://www.derbyshiretimes.co.uk/webimg/b25lY21zOjExNmVmYmFkLWFlMzUtNGEyMy04NTVmLTQ3NGE3NzE4NWM5ZjpiMjE5MWZmOC1jYjgwLTRlODctOTliOC1kYjNlZDhmNmNmZTI=.jpg?crop=3:2&width=800)
7. Darren Hall
Hall, 36, was jailed for life with a minimum of 17 years in custody for the murder of his former partner Sarah Henshaw. Derby Crown Court heard how Hall, who denied the murder, dumped the Ilkeston woman's body in a lay-by hours near Chesterfield just hours after her death. He spent the days which followed "covering his tracks" trying to make it appear as though she had simply left home. Photo: Derbyshire Police