This video can not be played

The sisters of the man suspected of being the so-called "Putney pusher" have told the BBC their brother was innocent, and the police showed "no urgency" to clear his name.

Speaking on BBC Radio 4's Today programme, Nicholas Brandram's sisters accused the Metropolitan Police of being "negligent and reckless".

Brandram was found dead on Tuesday evening and his family said he "took his own life after months of immense pressure" caused by the investigation.

Brandram's sisters Alexia Hicks and Sophie Voelcker told Today presenter Justin Webb their brother's mental health deteriorated after his arrest and questioned why the police were not able to carry out DNA tests that could have proved his innocence.

More on this story.

Brother didn't match description of 'Putney pusher', suspect's sisters tell BBC. Video, 00:02:02Brother didn't match description of 'Putney pusher', suspect's sisters tell BBC

Up Next. Jogger 'pushed' woman in front of bus. Video, 00:00:22Jogger 'pushed' woman in front of bus

Watch: Can humpback whales experience grief? Video, 00:00:54Watch: Can humpback whales experience grief?

See tiny organisms on show in microscopic video competition. Video, 00:00:58See tiny organisms on show in microscopic video competition

Is Canada about to join the EU? Video, 00:01:28Is Canada about to join the EU?

Ed Sheeran's tour in 'damage control mode' after Macklemore backlash. Video, 00:01:24Ed Sheeran's tour in 'damage control mode' after Macklemore backlash

Royal row intensifies after fresh claims in Diana's brother book. Video, 00:01:08Royal row intensifies after fresh claims in Diana's brother book

Watch: Will Ed Sheeran cancel his tour as support acts quit? Video, 00:01:22Watch: Will Ed Sheeran cancel his tour as support acts quit?

Runaway horse captured by police on motorbikes. Video, 00:00:45Runaway horse captured by police on motorbikes

'Luck and timing': Matthew Rhys on his historic Emmy Awards double win. Video, 00:01:15'Luck and timing': Matthew Rhys on his historic Emmy Awards double win

Warning of space arms race as US confirms weapons in Earth's orbit. Video, 00:01:27Warning of space arms race as US confirms weapons in Earth's orbit

The key findings and recommendations from the Lucy Letby inquiry. Video, 00:01:22The key findings and recommendations from the Lucy Letby inquiry