The Underbelly: A Tale of Two Cities star was detained by police for allegedly assaulting a clerk at the Courtyard Marriott hotel on 17 April (12).
The incident, which was caught on the hotel's CCTV cameras, reportedly followed an argument over a lack of mobile phone coverage in the building. The actor accused the man of spitting at him, but the clerk denied the claim.
The hotel manager called cops and Newton, 35, was arrested on suspicion of battery and resisting arrest without violence after allegedly trying to pull away when officers attempted to handcuff him.
He spent eight hours in custody before he was released on bail.
Miami-Dade Police spokesman Napier Velazquez, says, ""Mr Newton is claiming the clerk spit in his face, however the clerk had his back to the camera so you cannot see that at any point. Newton is talking to him over the counter, he gets upset, he knocks the papers off the desk, he walks around the side, and that's when he punches him. He drops to the ground and Mr Newton follows him down and then we see the clerk stumble and get up and Mr Newton's following him.""
Newton is due in court on 11 May (12) to answer the charges, while he will be back in front of a judge on 15 May (12) to face allegations of obstruction and trespass stemming from a previous arrest in Miami this month (Apr12).
He was accused of becoming abusive when asked to leave a bar in the city on 6 April (12).