'My brother was convicted under joint enterprise'
A group of MPs is calling for changes to the law of joint enterprise.
It can be used to convict a gang for a serious offence like murder even if only one member is responsible for delivering the fatal blow.
The director of public prosecutions has agreed to produce new guidelines spelling out the level of involvement needed to charge someone with murder.
Ashleigh Towers, whose brother was convicted of murder under joint enterprise, told the BBC people shouldn't be held responsible for the actions of others.