Following extensive inquiries a 26-year-old man was arrested by officers in Stoke on Trent and will now be questioned by Lancashire detectives on suspicion of murder and attempted murder.
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Craig Johnson, 25, was driving with partner Julie Douglas and their one-year-old daughter Maisie when the rock was hurled at them.
A terminally ill five-year-old boy led out the England team at Wembley with his "best friend" Jermain Defoe.
It comes as the country faces a major migrant crisis with more than 62,000 stranded including outside the port of Piraeus.