Campbell, 32, who has played Premier League football for Birmingham, Blackpool and most recently QPR is being scrutinised for a tackle on Ipswich Town’s Aaron Cresswell during a league game last Tuesday.
He was held by National Crime Agency (NCA) officers and is the most high-profile name to be detained so far in relation to claims of match-fixing by illegal betting syndicates.
Over the weekend the NCA made confirmation from a video evidence supplied by The Sun that ex-Portsmouth defender Sam Sodje said he could make arrangements for footballers in the Championship to get themselves a yellow card in return for tens of thousands of pounds.
He also claimed he could rig Premier League games and even said he was preparing to fix matches at next year’s World Cup in Brazil.
Also on film, former West Ham player Cristian Montano, now of Oldham Athletic, appeared to explain how he attempted to get a yellow card during a match against Wolves in return for cash.
The newspaper report claims that club managers have been concerned about the prospect of match-fixing for months, something League Managers’ Association chief executive Richard Bevan confirmed.
He said: “I’d say there have been occasions where we have debated such issues. But it wouldn’t be appropriate to go through them in public.
“What is important is that The FA, Premier League and Football League continue to make sure our game is continuing to move forward. Whether it is cricket or football all around the world there are issues in this 24/7 internet and social media world that puts a lot of pressure on.
“There needs to be really strong leadership at the top.”