How this callous, calculating killer murdered Karen and used Google and a TV show to try and avoid detection
SATURDAY APRIL 11 - 11pm Karen Buckley and Alexander Pacteau and their respective friends separately head to The Sanctuary nightclub on Glasgow's Dumbarton Road.
SUNDAY APRIL 12
1am Pacteau, pictured above on CCTV outside Sanctuary, leaves the club intending to go home. He changes his mind, goes back to the club and then leaves again. He paces up and down across the road from the club.
1am Karen Buckley leaves the club intending to walk home alone. She had given her jacket to a friend who broke a zipper on her dress.
1.06am-1.18am Pacteau offers Karen Buckley a lift. She gets into his car only for him to attack and kill her at Kelvin Way. His car is parked there for around 12 minutes. He later drives around the area of Dawsholm Park.
2am Pacteau returns to his flat on Dorchester Avenue. He brings Karen Buckley's body into the flat, puts it in a bedroom and then goes to sleep.
7am The young woman's handbag is found at Dawsholm Park near a council bin (below).
8am Pacteau awakes and uses his mobile phone to check the chemical properties of sodium hydroxide/caustic soda.
9.42am Pacteau goes to buy caustic soda at B&Q.
10am He returns to the flat and removes Karen Buckley's clothing, places her body in a bath and submerges it in caustic soda.
1pm/2.30pm Karen's friends become worried about her and alert Police Scotland.
5pm Pacteau drains caustic soda solution from the tub and brings the body into his bedroom.
8.15pm Pacteau's flatmate arrives back after a hill-walking expedition with their mother and discovers him cleaning the flat and corridor.
8.30pm Pacteau goes to bed.
MONDAY APRIL 13
4.52am Pacteau goes to Bridge 27 on the Forth & Clyde canal and dumps the spanner that he used to kill Karen.
4.52am/6.27am He travels to Tesco on the Maryhill Road and asks a staff member to recommend cleaning products to remove blood stains from a mattress.
6.27am Pacteau goes to Milngavie Tesco to buy white spirits and a lighter.
He then drives to High Craigton Farm, 7km from Glasgow, to burn clothing and blood-stained cleaning gear.
8.34am Pacteau uses his mobile to research storage equipment and purchases a heavy blue 220 litre plastic barrel from Invopac which he collects at 9am.
9.38am He buys more caustic soda and drain fluid from Poundstretchers.
(No Time) Pacteau wraps mattress and places it in his Ford Focus car (below).
10.27am Pacteau drives to Asda to buy lighter fluid.
10.41am Pacteau drives to High Craigton Farm and burns mattress, duvet, clothes and a suitcase.
11.19am/2pm Karen's body is placed in the barrel, with parcel tape around her head. The barrel is then filled with 40 litres of caustic soda.
2pm Neighbours see Pacteau struggling to load the heavy blue barrel containing Karen's body into his car, 36 hours after he brought her to the house.
2.22pm Pacteau stops at Asda to buy padlocks and white spirits. He then drives to High Craigton and agrees a £10 fee with the farmer to rent a storage unit for a week.
3.41pm Pacteau buys another padlock at Tesco and places the sealed barrel in the shed which is carefully locked (right).
4.16pm Pacteau drives to Anniesland Car Valet Centre to get his car cleaned.
6pm Police Scotland call to the Dorchester Avenue flat after Alexander Pacteau was identified from CCTV footage outside the nightclub. He tells them: "I was just calling to see you."
(No Time) Pacteau is questioned at Helen Street police station as a witness. Keys and a Poundstretcher receipt for caustic soda are found in his pocket.
(No Time) He is released and goes to stay at the Holiday Inn while forensic experts examine his flat.
WEDNESDAY APRIL 15
1.55pm Pacteau is detained at Starbucks in Glasgow and quizzed at Helen Street as a suspect.
3pm Following a major media appeal, a caller contacts police and informs them of Pacteau's link to High Craigton Farm. His car also matches the description of the vehicle sought by police.
3.30pm Police Scotland arrive at High Craigton Farm. Health and safety concerns mean they cannot immediately open the blue barrel in the storage shed.
8pm Police open the barrel and discover Karen's body.
FRIDAY APRIL 17
3pm Alexander Pacteau is charged with Karen Buckley's murder.
TUESDAY APRIL 21
(No Time) Police divers locate the spanner used to kill Karen in the Forth & Clyde canal.
MONDAY APRIL 27
(No Time) Burned mattress found at High Craigton Farm. Blood is also confirmed to be on parcel tape.
TUESDAY, AUGUST 11
12.02pm Alexander Pacteau pleads guilty to the murder of Karen Buckley.