Polish-born Zofija Kaczan, who suffered multiple injuries in an attack on May 28 and later died. (PA)

A mugger has been convicted of killing a frail 100-year-old widow in a street robbery.

Self-confessed heroin addict Artur Waszkiewicz knocked Zofija Kaczan to the floor, took her handbag and left her to bleed in the middle of the road as she made her way to church on May 28 last year.

Polish-born Ms Kaczan, who survived a Nazi camp during the Second World War, suffered multiple injuries, including a fractured neck and cheekbone.

She died from pneumonia in hospital on June 6 – a condition brought on by the injuries she sustained in the attack.

A jury of seven men and five women at Derby Crown Court found Waszkiewicz guilty of killing her close to the junction of St Chads Road and Empress Road in Normanton, Derby.

View photos The road junction in Normanton, Derby, where Zofija Kaczan was attacked. (SWNS) More

The jury deliberated for just over two hours before unanimously convicting Waszkiewicz of manslaughter and robbery.

The defendant, wearing a black velvet jacket and velvet slipper shoes, looked straight ahead and showed no emotion as the verdicts were delivered.

He was caught on CCTV driving a Seat Leon car he bought from his father minutes before robbing Ms Kaczan – slowing down as soon as he saw a “small, vulnerable” woman on her own.

Waszkiewicz needed an “easy target” to steal from so he could meet a drug dealer a short time later to buy £20 of heroin.

The force he used ripped the handle off the handbag, inflicting significant bruising on Ms Kaczan’s arm.

View photos Zofija Kaczan’s recovered handbag found after the attack. (SWNS) More

Opening the case, prosecutor Kate Brunner QC said: “She was attacked, she was thrown to the ground and her handbag was snatched from her.

“She was small, on her own, vulnerable – an easy target for a man desperate for money.

“He attacked Ms Kaczan, yanking her handbag from her and leaving her injured in the road and driving off.”

Police arrested Waszkiewicz, who was also born in Poland, after his fingerprint was recovered from a receipt in the bag.

He fled the city and hid under a bed at his mother’s house in London to try to avoid arrest.

View photos Waszkiewicz was convicted of manslaughter and robbery in just two hours by a jury at Derby Crown Court. (SWNS) More

He drastically altered his appearance by cutting his long hair and changed the insurance details on his car.

The jury heard he was so desperate for cash that he had tried to sell his dog, and asked neighbour John Shinners for money.

The trial was told the 40-year-old had a number of previous convictions including shoplifting, creating false identification documents and one offence of battery.

He denied both charges, saying he had found the green handbag in the middle of the road, picked it up, and disposed of it at a well-known fly-tipping area because there was no cash.

Waszkiewicz, of Hilary Road in Shepherd’s Bush, west London, will be sentenced at the same court on Thursday.