Nicholas Brandram, 44, was arrested in June on suspicion of being the "Putney pusher" – the jogger alleged to have pushed a woman into the path of a bus on Putney Bridge in 2017. He was released under investigation but later also charged with drug possession. He died at his home on 15 September, which his family says was a result of police negligence in handling his case. The Metropolitan Police has since referred itself to the Independent Office for Police Conduct.

The family's central complaint concerns contradictory police statements about outstanding investigative lines and a delayed DNA test. A detective's email from 7 September stated Brandram was awaiting "our final line of inquiry being completed", but Chief Superintendent Dan Knowles subsequently claimed multiple inquiries remained ongoing. The family contends the DNA test would have cleared Brandram and that delays in its completion – despite Brandram offering to pay for private testing – contributed to his deteriorating mental health. Brandram was a former army captain and director at HSBC's private bank; the woman injured in the original 2017 incident sustained only minor injuries when the bus driver managed to swerve around her.