A Maui High School teacher who announced this week he was stepping down as the football coach is being investigated on suspicion of first-degree attempted sexual assault.

Maui Police Friday said David V. Bui, 39, of Wailuku had been arrested Thursday, then later released pending further investigation.

Police said an investigation revealed that text messages were exchanged between Bui and a female high school student, “that of which were of explicit nature.”

Bui decided Tuesday that he was resigning as Maui High’s football coach in favor of coaching baseball for his son’s Little League team, according to the Maui Now.com

Bui was unavailable for comment.