Figures released by the Home office shows the number of arrests made by police in Dorset has more than halved in the last decade.
The figures show the police in Dorset conducted 7,460 arrests in the year to March, compared to 17,163 in 2007-08.
Police data across England and Wales show police carried out 698,737 arrests in 2017-18, 8% fewer than it recorded for the previous year and half the level 10 years ago.
“This continues the downward trend seen since a peak in the year ending March 2008,” a government report said.
The National Police Chiefs Council warned in the wake of the findings “proactive capabilities” to prevent crime have been “significantly curtailed”.
50,086 crimes were registered by Dorset police in the 12 months to June- representing an increase of 8% on the previous year according to police data released last week.
In England and wales, police registered 5.6 million crimes – since March 2005.
According to Labour MP Yvette Cooper, who chairs the Home Affairs Select Committee, “These are shocking figures. Arrests have almost halved over the last 10 years and fallen by 8% in the last year alone.
“Arrests are going down at exactly the same time as serious crimes are increasing at an alarming rate.”
Chief Constable Charlie Hall, the NPCC’s lead for operations, said: “Arrests, stop and search and people tested for drink or drug driving are all at the lowest level since data has been captured.
“This reinforces our concern about growing demand and our ability to meet it with the resources we have.”