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NFL investigator buys Williams sisters' apartment

DeflateGate drags on in court, but the man who investigated the National Football League saga made out just fine.

Attorney Ted Wells
Louis Lanzano | Bloomberg | Getty Images
Attorney Ted Wells

DeflateGate investigator Ted Wells and his wife have bought a Manhattan apartment previously owned by tennis stars Venus and Serena Williams for $2.1 million, according to public documents released Wednesday by the New York City Department of Finance. The Williams sisters paid $1.34 million for the property in 2005 and have rented it in the past.

Wells conducted the NFL-commissioned investigation into whether New England Patriots players and personnel knew footballs used in January's AFC Championship Game were inflated below regulation levels. The probe led to star quarterback Tom Brady's four-game suspension, which he is fighting in court this week.

Read MoreDeflateGate appeal: Tom Brady loses no matter what

Wells' firm charged the NFL a hefty fee for the investigation—more than $2.5 million, according to court documents obtained by CBS Sports. He also led the 2013 probe into bullying in the Miami Dolphins locker room.

The loft apartment at 28 W. 38th St. stands at 1,800 square feet.