"We must get to truth of what happened before, during and after that awful night," the home secretary says while announcing the review.
Dozens of people had been inside the church for a funeral when the shooting began, local media report.
Tia Langdon, 25, fell from a third-floor balcony after being attacked by a man in a flat.
William Dunlop is seeking parole 20 years after he was jailed for murdering Julie Hogg.
Authorities uncovered the plot when the man's heirs tried to sell the south Florida home, police say.
BBC London accompanies officers on a raid at a phone shop in Electric Avenue, Brixton.
Investigative genetic genealogy can help hunt down criminals but raises worries over privacy.
A student who stabbed his housemate more than 30 times in a masked ambush has changed his murder plea to guilty.
Jamie Collins, 21, was killed by Zack Coughlan, 23, his housemate in Bristol, where they were studying.
