Khafi Kareem took to Twitter to plead for information about her brother's killers. She also shared a video of which the members of her family appeared on BBC, with her mother in tears pleading for the killers to turn themselves in to the police.

"On the 1st of January 2020 I had no idea I would be going into the 1st day of the second half of the year without my little brother, Almost a month on and the person who has broken my family still has not been found. The hardest thing was not being there for my brother when he cried out for help. I'm praying we can help him now. If you know who did this please come forward. I beg you. #HelpAlex," she wrote on twitter

In the BBC video, members of her family spoke on their late brother and son Alexander and pleaded with his killers to turn themselves in.

The police think it's a case of mistaken identity. They wrote, "Please #SHARE|We believe the murder of Alexander Kareem, 20, was a case of mistaken identity."

"He did nothing wrong, he simply left convenience store and was fatally shot."

"Alexander's family "We weren't there to help Alex in his last moments but we can help now, as can you."

Khafi's mum was left in tear as she said "If you did this and you are watching this at home, Please turn yourself up to Police. No mother should go through this. This is everlasting sorrow, which no mother should suffer like this."

Watch video below.