Police investigating the life of serial killer Peter Tobin have begun searching the gardens of two properties.
Specialist search teams arrived at addresses in Brighton where the triple murderer lived during the late 1980s.
Officers are using ground-penetrating radar to discover if any bodies or evidence may be buried at the homes.
The search is part of a nationwide investigation, dubbed Anagram, to see if the former church handyman is responsible for any more murders.
Tobin, 63, is serving life terms for the murders of three women - 18-year-old DInah McNicol, 15-year-old Vicky Hamilton and 23-year-old Angelika Kluk.
Detectives said information led them to search the back gardens of housing association flats at 152 Marine Parade and two beauty shops with a flat above at 67 Station Road, Portslade.
Experts from Sussex Police, archaeologists from University College London and officers from the Home Office and Met Police are all working alongside each other.
Substantial excavation will only take place if further evidence emerged that something may be buried in the gardens.
Police vowed to leave "no stone unturned" as they launched the operation into Tobin's past.
The itinerant serial killer has lived in several towns and cities, including Glasgow, Brighton, East Sussex, Margate, Kent, and Havant, Hampshire.
Tobin lived in Brighton for 20 years from the late 1960s, including in an eight-bedroom house with a patio garden in Dyke Road.
Police said although several other addresses in Brighton were linked to Tobin they would not be searched.
Detectives discovered the remains of Vicky Hamilton and Dinah McNicol buried in the garden of a house in Margate, Kent, where Tobin moved to in March 1991.