The PM can not open a Police investigation!

The Herald reports:

Arthur Allan Thomas will petition the Prime Minister to reopen the investigation into the Crewe murders.

“It’s going to the Prime Minister. The police are just cover-uppers and the Prime Minister is the only man who can do something about it.”

No the Prime Minister can not re-open a Police investigation. Only the Police can. If the PM could re-open a Police investigation, then he would have re-opened the one into Labour’s electoral over-spending in 2005.

The PM also can not close down an SFO investigation.