For those who don't follow football, he's a retired NFL player.  His case is in the news now because IRS (through the Justice Department) is suing him for taxes they have been trying to collect, unsuccessfully, for nearly two decades.  There is a Tax Court case, filed in 2010 involving 1998 through 2004.  Romanowski and his wife lost that in 2013, with a judgment against them for what looks like about $5 million plus interest.  I didn't add up all of the years, but you can find the 49-page opinion on the Tax Court website. 

Then their tax problems continued because they started a "nutrition" company that was feeding them money for personal expenses, hoping IRS wouldn't notice.  If someone wants to avoid collection, they can often avoid payment for years.  Liens were probably filed; those could have been renewed, but the last resort is a civil suit in federal court.  Further delay is then possible with a bankruptcy filing, which is what the Romanowskis are doing now.  

A couple of later case were settled by stipulation.  Those decisions were signed by Tax Court Judge Kroupa, who along with her husband pled guilty to tax evasion in 2016.  No, I am not making this up.