Miami prosecutors will investigate whether Australian actor Matthew Newton is suffering from a mental illness.
Newton has been arrested twice this month in the Florida beachside city, with police alleging the latest incident involved the 35-year-old punching a hotel clerk in the face.
Prosecutors were unaware Newton possibly had a mental illness until they came across some Australian media reports.
"We had no idea he had some mental health issues," Terry Gonzalez-Chavez, of the Miami-Dade State Attorney's Office, told AAP.
"I have passed that information on today to our prosecutors.
"We have a very good mental health system down here for people charged with misdemeanours, and maybe they should take a look at him to see if there is anything there.
"I think we all agree that it is just not usual for someone to engage in the kinds of behaviours he is engaging in, which seems to be unprovoked."
Newton's Sydney-based lawyer, Chris Murphy, has repeatedly pointed to his client's mental illness.
In a Twitter message on Tuesday Mr Murphy wrote: "Can't cure mental illness with 'You stop that!' Bipolar sufferers need patience & support."
Newton's troubles in Miami began on April 6 when he was charged with resisting a police officer and trespassing at the popular watering hole, Mr Moe's Restaurant and Bar.
The latest incident happened just before 5am on April 17 when Newton confronted a clerk at Miami's Marriott Courtyard Hotel.
Newton was allegedly upset about a phone call dropping out and he is accused of punching the male clerk with a closed fist.
The incident was partially caught on a hotel security surveillance camera, and Newton was charged with battery and resisting arrest without violence, both misdemeanours.
If found guilty, he faces up to one year in jail.
The Miami-Herald newspaper on Tuesday described Newton as "quickly becoming the bad boy of Miami".
"The 35-year-old Newton might not be well known Up Here, but Down Under he's shaping up as the Charlie Sheen/Sean Penn/Robert Downey Jr of Australia," the Herald wrote.
Newton has a history of legal troubles, including last year's alleged assault of Sydney taxi driver Mohsen Khayami.
In 2007 Newton pleaded guilty to assaulting actress and former girlfriend Brooke Satchwell, and in 2010 another former girlfriend, Transformers actress Rachael Taylor, accused him of assaulting her during a 2010 Italian vacation.