GRAND RAPIDS, MI -- A massage therapist at a Grand Rapids spa has entered a plea to a sexual assault charge.

Lance Dion-Tyler Martinez, 34, pleaded no contest Tuesday, June 14, to fourth-degree criminal sexual conduct.

Police said Martinez assaulted a woman while working at Massage Green Spa, 3529 28th St. SE. The victim reported he touched her inappropriately during a massage Sept. 23.

In exchange for Martinez' plea, prosecutors have agreed not to file further charges connected to the case.

The Grand Haven resident remains free on $10,000 bond prior to sentencing July 28.

Martinez was the second massage therapist from Massage Green Spa charged with sex assault this year.

John Timothy Ashby, 54, of Caledonia Township, was charged with third-degree criminal sexual conduct in March. He allegedly assaulted a 41-year-old woman during a massage.

Ashby's case is set to go to trial next week.

Police said the cases are not related.

Angie Jackson covers crime and breaking news for MLive. Email her at ajackso3@mlive.com, and follow her on Twitter.