A woman is being questioned over the death of the man whose body was found in Bolton.
The new ranking comes four years after the force was taken out of special measures.
Marwan Jumaa, who is serving a sentence for attacking two women, escaped on Tuesday evening.
"I was terrified for my life as well," campaign leader Karen Hawthornwaite says.
CSI Amber Boswell says finding a stolen car can reveal lots of forensic evidence as "the gloves are off".
Police say the man was found 'unresponsive' in the water on Friday evening.
A man is on trial after Devon Simmonds-Caines, 15, died in Middleton in July 2025.
Steven Dossett, 40, died on Saturday after he was attacked in Failsworth, Manchester, on 19 June.
Ramon Logan suffered life-changing injuries two years ago and died on 30 June, police say.
