ATLANTIC CITY -- On the same day Donald Trump officially secured the Republican nomination for president, his Democratic rival Hillary Clinton released another video calling his record into question, this time featuring a retired music store owner who says the one-time Atlantic City casino magnate partly stiffed him on a six-figure order decades ago.

The three-minute "testimonial web video" produced by Hillary for America stars Mike Diehl, a father of five who owned Freehold Music Center in 1989. In the video, Diehl says he received an order for pianos worth $100,000 from the Trump Taj Mahal casino.

Diehl waited more than a month after delivering the pianos before calling about the bill, stating he received a "runaround at first." Eventually, Diehl was told the casino did not have the money to pay the bill in full and was told he would have to accept 70 cents on the dollar or try his luck in bankruptcy court.

"I feel as if someone stole $30,000 from me," Diehl, 88, says in the video.

In public statements, Trump has boasted about his performance in the Atlantic City casino business, stating he pulled out of the resort city before it "cratered."

"I made a lot of money in Atlantic City. And I'm very proud of it," Trump said during the first GOP debate in August.

Diehl was among several people interviewed in an extensive USA Today article published earlier this month detailing Trump's record in Atlantic City, including the bankruptcy of the Taj Mahal, one of five times a Trump casino property filed for bankruptcy.

Paul Milo may be reached at pmilo@njadvancemedia.com. Follow him on Twitter@PaulMilo2. Find NJ.com on Facebook.