"I welcome today's decision by the IPCC to look into the role of West Midlands Police following the tragedy at Hillsborough in 1989.
"As Chief Constable I read the Hillsborough Independent Panel Report and immediately referred West Midlands Police to the IPCC.
"Today, the IPCC have accepted that referral and West Midlands Police will give their full support to the IPCC investigation."
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The Metropolitan Police Federation, which set up the official JustGiving site, said it felt a "suitable amount" had been collected.
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Janet Ajao said in a statement: "I do not condone his actions nor support the beliefs he held that led to him committing this atrocity."