A Lawrence firefighter who pleaded guilty to child molestation more than a decade ago has been placed on administrative leave after being accused of molestation again.A young adult alleges that Michael Darrell Kopp molested her when she was 16 years old, 6News' Jack Rinehart reported. Previously, Kopp pleaded guilty to molesting a teenage relative. In that case, police said Kopp reached under the nightshirt of the sleeping teen and fondled her in July 1993 -- about two years before he joined the Lawrence Fire Department.In the 1993 case, Kopp pleaded guilty to a felony molestation charge. A judge ordered him into a sex offender treatment program, Rinehart reported.Less than a year later, Kopp successfully petitioned a court to reduce his conviction from a felony to a misdemeanor. A year after that Kopp applied to the fire department.Police now say Kopp lied about his criminal history when he applied to the fire department. A city attorney is examining the application, Lawrence Assistant Police Chief Robert Bowser said.Police are investigating the newest allegation. Kopp has hired an attorney, Rinehart reported.