RIVERSIDE Four people who worked at a Rancho Cucamonga business that offered bogus loan modification programs to thousands of financially distressed homeowners were sentenced Monday to federal prison. One of the leaders of the scheme was ordered to spend 20 years in custody. The victims lost more than $7 million when they paid for services that were never provided. The telemarketing operation was known under a series of names – including 21st Century Legal Services, Inc. More than 4,000 homeowners across the nation were bilked, many of whom lost their homes to foreclosure. Those sentenced in US District Court included: Christopher Paul George, 45, of Rancho Cucamonga, a co-owner of 21st Century. 20 years in federal prison; • Crystal Taiwana Buck, 40, of Long Beach, a sales “closer” • Albert DiRoberto, 62, of Fullerton, who handled both sales and marketing • Yadira Garcia Padilla, 38, of Rancho Cucamonga who handled client complaints and refund requests