Las Vegas tech firm works to combat illicit college sports betting: "How much bigger do we get than a starting quarterback?"

It's impossible to watch sports on television or online today without seeing ads for online gambling. Betting on sports has a become a huge business, with the American Gaming Association saying that more than $93 billion was spent on sports gambling just last year.

As that number continues to grow, so do the scandals. A string of incidents in college sports this year is raising questions about the impact of gambling on college athletes' integrity. 

When the Iowa Hawkeyes took on the Iowa State Cyclones in September, it was five players not taking the field who made some of the biggest headlines. All five, including Iowa State's star quarterback, were sidelined and dealing with criminal betting charges. Some had even bet on their own teams — something that Matt Holt, the operator of Las Vegas-based tech firm U.S. Integrity, said "just can't happen."