Showing the jury photographs of the living room, Evans said the blood stains near the wood-burning stove, on the carpet and on the sofa were a "one-in-a-billion" match to April's DNA profile.
Bridger, an experienced slaughterman who once worked at an abattoir, denies abducting and murdering April as she played near her home in the small town of Machynlleth in mid-Wales on October 1 last year.
The prosecution says he went to great lengths to clean up the evidence of her murder, although police officers who went to his home had not realised the significance of his efforts at the time.
Evans said: "When they went in there they stated that the house was uncomfortably hot, that there was a strong smell of detergent, and a smell of cleaning products, air freshener and washed clothes.''
Bridger made a series of statements to police, but his final account was that he had accidentally crushed the child to death under the wheels of his Land Rover on the estate where she lived near two of his own children.
A combination of "alcohol, adrenaline and panic" meant he could not remember what he had done with her dead or dying body after loading it into the vehicle, however he did later claim to have put it somewhere "out of the rain", the court heard.
The prosecution alleges Bridger had a large collection of internet images of child abuse and pictures of April and her two teenage half-sisters which he took from Facebook and other social media sites.
The jury at Mold Crown Court heard that Bridger was fascinated by child murders and kept pictures from notorious cases from around the world.
His collection included Soham victims Holly Wells and Jessica Chapman.
The trial continues.
- Independent with AFP
