Mum Sasha Johnson, 27, is a prominent black equal rights activist in London (Image: Taking The Initiative/Facebook)

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A second teenager has been charged with conspiracy to murder over the shooting of a Black Lives Matter activist, say police.

Mum Sasha Johnson, 27, remains in a critical condition in hospital after being shot in the head at a party in Peckham, south London, in the early hours of Sunday May 23.

The Metropolitan Police said that Devonte Brown, 18, of Southwark, was charged on Friday evening with conspiracy to murder.

He appeared at Westminster Magistrates’ Court on Saturday and was remanded in custody to appear to the Old Bailey on July 7.

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Ms Johnson was in the back garden of a house in Peckham when a group of men burst in and opened fire
(Image: Getty Images)

Five males were arrested in connection with the incident on May 26, and four of them released on bail until a date in late June.

The fifth, 18-year-old Cameron Deriggs of Bromley Hill, Lewisham, was charged with conspiracy to murder.

He appeared at Westminster Magistrates’ Court on May 29, police said.

He was remanded in custody to appear at the Old Bailey on June 25.

Forensics officers carry out an investigation the day after the shooting
(Image: REUTERS)

Ms Johnson, a member of the Taking The Initiative Party, was in the back garden of a house in Consort Road, Peckham, when a group of men burst in and opened fire.

A man in his 20s also suffered a superficial knife wound as violence erupted.

Police said there is no evidence to suggest the attack was targeted.

Earlier this week, Ms Johnson's devastated mother appealed for witnesses to her shooting to come forward.

Ms Johnson, pictured at an event last year, remains in a critical condition in hospital
(Image: PA)

Ellet Dalling released a statement through the Metropolitan Police that said: “What has happened to Sasha has left us devastated. She is currently fighting for her life in hospital, with two children asking where their mummy is. What do I tell them?

“Someone must have information to what happened and to come forward.

“Sasha is passionate about standing up for others; please come forward and stand up for Sasha.

“Come forward to help us. I know it is not always easy, but imagine if it was your daughter or the mother of your children. I believe there are people out there that can help.”

A police officer stands guard at a cordon in Peckham the day after the shooting
(Image: Getty Images)

Detective Chief Inspector Richard Leonard said previously: “I would urge those who were at the party to make contact and tell us what you know.

"It is vital that we gather as much information as possible to establish what happened in the early hours of that Sunday morning and why.

“Sasha remains in a critical condition, and her family has been left devastated by what has happened.

"We are in regular contact with them and, quite rightly, they have a lot of questions that are currently unanswered.

"You can help us to provide them with the answers they desperately need.”

Anyone with information can call the police incident room on 020 8721 4843 quoting reference CAD 1172/23May, or, to remain anonymous, contact Crimestoppers on 0800 555111.