Derby are set to issue a formal apology to Nottingham Forest after sections of their support sang distasteful songs about their rivals' former owner Nigel Doughty.
Jake Buxton's late goal gave Derby a dramatic 1-0 victory after relegation-threatened Forest had former Rams striker Marcus Tudgay sent off late for two bookable offences, but the post-match talk was dominated by shocking chants about Doughty, who was found dead at his home at the age of 54 last month.
Small sections of the home fans chanted "where's your chairman gone?'' and "you're going down with your chairman" to leave Forest manager Steve Cotterill sickened.
"Nigel [Clough] will probably be embarrassed by that tonight, I would imagine," Cotterill said. "Nigel is a good man, I get on very well with Nigel. I'm sure he would be very disappointed with that tonight, and most people who have chanted that, they need to be ashamed of themselves.
"What have they done coming out to a football match tonight and come out with that about Nigel Doughty? They need to be ashamed of themselves. They've used football as a carriage to open it up.
"Unfortunately what you can't do and what Nigel [Clough] can't do is he can't stop those thousands doing it.
"God bless his soul Nigel Doughty, he was top man for this football club, one of the best chairman that has probably ever been in the Championship. Not just because of the way he funded it, but because Nottingham Forest was his life as well.
"The worst part about it tonight was that we haven't got a result, but he would have been pretty pleased with our effort and commitment tonight."
Derby boss Nigel Clough said the Rams would investigate the chants and issue an apology to Forest.
"The club will do that (apologise), we'll do that officially with the club and Tom Glick (Derby chief executive),'' he said. "With regards to an investigation being launched; I'm sure we will look at it in the next few days."
Asked about an investigation being launched, he added: "I'm sure we will look at it in the next few days. I'm the manager of the football, that's more of a club issue. I was aware of a couple of chants, but you get so engrossed in the game."