A thief stole a laptop from the funeral of a six-year-old child after it was used at the service to show photographs of the young boy.
The boy's 34-year-old father had left the laptop in a bag in the Pentecostal City Church in north London while the family went to the burial ceremony in Kensal Rise, around a mile away.
CCTV images from the church show a limping man walk into the church hall before emerging around 15 minutes later with the laptop in a carrier bag.
Detective Constable Ben Kirkham, from Hammersmith and Fulham CID, said the loss of the photos of the young boy has caused "huge upset" for the family.
"The theft of this laptop with the father's precious photos of his son has obviously and understandably caused huge upset for the entire family, who are already going through a difficult time."
Police would like to speak with a man who is described as about 40 years old, who was wearing a black hooded jacket, a white hooded top with writing on the front and blue jeans, and walks with a distinctive limp.