Meet the alleged ringleader of the massive college-admissions scandal, William 'Rick' Singer, the owner of Edge College & Career Network

William “Rick” Singer is the alleged ringleader of the massive college-admissions scandal unveiled Tuesday.The US Attorney's Office for the District of Massachusetts accused Singer of paying off college coaches, administrators, and standardized-test proctors to get kids into elite universities.Singer appears to have a long history in the college-admissions business.He pleaded guilty to charges in Boston on Tuesday afternoon.William “Rick” Singer, 58, is the founder of Edge College & Career Network, LLC and CEO of the Key Worldwide Foundation, the companies at the center of the 2019 college-admissions scandal that has resulted in the prosecution of 33 parents, including celebrity Felicity Huffman, and 13 college coaches and other business associates.Singer is the alleged mastermind of the scheme that brought in millions of dollars by creating fraudulent college applications for prospective college students by fudging test scores, creating fake identities, and editing photos by putting kids' faces onto athletes bodies to portray them as having athletic abilities they do not have.Here's what we know about Singer and his businesses.