Donna Hussey , three-year-old , targeted by trolls online over 32 son 's death . Young Freddie died after being crushed against a wall by a runaway trailer . Tony Davies spared jail after admitting causing death by careless driving . Mrs Hussey branded 'bad mum ' by trolls who blame her for Freddie 's death .
Donna Hussey , 32 , targeted by trolls online over three-year-old son 's death . Young Freddie died after being crushed against a wall by a runaway trailer . Tony Davies spared jail after admitting causing death by careless driving . Mrs Hussey branded 'bad mum ' by trolls who blame her for Freddie 's death .