Mother, 24, 'murdered son, 2, by savagely beating him to death after attending parenting classes where she pretended to be caring'   

• Keanu Williams died after 'several months of torture' prosecutors allege
• His mother Rebecca Shuttleworth is accused of his murder
• Shuttleworth's boyfriend Luke Southerton, 31, is also accused of the killing
• Both allegedly battered Keanu to death over 48 hours in Birmingham 
• Toddler found with 37 injuries and died of internal bleeding
• Shuttleworth had attended a 12 week parenting course in 2009
• But relatives say Keanu was 'often neglected' and left wearing a soiled nappy
• Shuttleworth and Southerton deny murder and two other charges