The Metropolitan Police Department said the men tried to meet undercover detectives posing as juveniles online.
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Lt. Col. Kevin DiFalco, 40, faces eight charges including child abuse and lewdness.
Lt. Col. Kevin DiFalco, 40, was relieved of his position on Thursday after his arrest.
Kevin Barnes, who uses the “Chopper” moniker, was booked Monday into the Clark County Detention Center on one count of sex trafficking of an adult.
A Clark County School District teacher was arrested Tuesday and booked on lewdness charges.
Arrold Jean, 53, is facing lewdness, sexual assault and kidnapping charges in connection with a series of alleged incidents since 2010, according to the report.
Police said the teen was suspected of beating and sexually assaulting a teacher at Eldorado High School around 3:30 p.m. Thursday after he went to her to discuss his grades.
A Clark County firefighter is accused of attempting to employ a decoy sex worker in a sex trafficking operation, according to an arrest report released Monday.
A man who previously worked as a Nevada parole and probation officer has been charged with sexually abusing a child in Las Vegas for years.
A girls basketball coach was arrested Tuesday on suspicion of attempted sexual misconduct, police said.