Abigail Grantstein is no longer with the NCAA, a source told ESPN.com.
The move comes a month after a woman told the Los Angeles Times she heard Grantstein's boyfriend loudly discussing the case on an airplane.
UCLA appealed and Muhammad was cleared to play for UCLA shortly after the newspaper's report.
Muhammad orginally had been ruled ineligible and sat out three games while the NCAA investigated impermissible benefits he was deemed to have accepted. Those games were later deemed to serve as his suspension following UCLA's appeal. His family also had to pay back about $1,600.
The NCAA has not commented on the reports.
ESPN.com college basketball reporter Dana O'Neil contributed to this report.