Piotr Mikiewicz's sister Anna told the court in a statement that her brother had been living in London for nine years and considered it his home.
"He was a wonderful man, full of compassion for others. He did not tolerate lies and theft. He was a believer and lived according to these principles."
"He was someone who represented everything that is good about decent people and was prepared to fight for what was right.
Anyone who knew Piotr knew he was a truly good and honest person. He had a strong sense of what was right and wrong.He wasn't just a road sweeper, he was part of the community that genuinely cared for him.
Piotr was a truly good person who was immensely proud of the job he did.
A cruel and thoughtless act can take away his life, but not the inspiration that he brought to so many people."
More top news
Clear periods and light winds tonight. Staying warm and muggy. Lows of 17°C.
It took police six days to launch a murder investigation after notorious British criminal John 'Goldfinger' Palmer was shot dead.
The high of 35C was recorded on a Bakerloo line train between Piccadilly Circus and Oxford Circus at 2pm.