Decision nears on Bynes' treatment

Amanda Bynes has been famous since landing a role on Nickelodeon's sketch comedy show "All That" at age 10. But in recent years she's been better known for legal trouble and tweeting strange statements and photos, leading to speculation about her mental health. In October 2014, that speculation continued as disturbing tweets were posted to Bynes' account containing allegations of abuse. Here's a quick timeline of Bynes' life and career:

Amanda Bynes became a superstar among the elementary-age crowd starting in 1996 as a member of the Nickelodeon show "All That," on which she memorably played a sweet young lady full of rage during the "Ask Ashley" skit.

By 1999, Bynes had become popular enough to host her own show. Nickelodeon put her at the center of the "All That" spinoff, "The Amanda Show."

By 2002, Bynes parted ways with her Nickelodeon shows and transitioned into movies. She starred in "Big Fat Liar" that year and followed it up with 2003's "What A Girl Wants."

Bynes landed not only a hit TV series with "What I Like About You," on which she starred with Jennie Garth from 2002 to 2006, but also reportedly a new boyfriend. Bynes and co-star Nick Zano reportedly began dating in 2003.

Between 2005 and 2007, Bynes steadily worked in film in addition to her TV sitcom. Seen here at the premiere of her 2005 animated movie "Robots," she also starred in "Love Wrecked" (2005) and a comedy with Channing Tatum, "She's The Man" (2006).

In 2007, Bynes starred in a summer hit with the remake of "Hairspray," which also featured John Travolta, Allison Janney (seen here), Zac Efron, Queen Latifah and Nikki Blonsky.

While working on movies like "Sydney White," Bynes' personal life also took the spotlight. She was briefly linked to athlete and reality star Doug Reinhardt, here at a Los Angeles Lakers game in December 2008.

Bynes hadn't yet announced that she was through with acting when she walked the red carpet at the 2009 MTV Video Music Awards. She saved that revelation for the following June, only to announce that she'd "un-retired" by July.

Sure enough, Bynes was still acting: Her comedy with Emma Stone, "Easy A," arrived in September 2010. It is, however, Bynes' last credited film.

In April 2012, Bynes shocked fans when she was arrested on suspicion of DUI after getting into a fender-bender with police not long after her 26th birthday. The DUI charge was later dismissed in February 2014 in a plea deal that gave the actress three years on probation, a requirement to attend an alcohol education course and a fine.

Bynes, seen here in April 2012, again made headlines that June when she asked President Barack Obama on Twitter to fire the officer who had arrested her. That August, she allegedly hit another vehicle, incurring a second hit-and-run charge.

By September, Bynes reportedly had her car impounded and was cited for driving on a suspended license. Despite her legal issues and other reports of oddball behavior -- like locking herself in a dressing room and taking off her top in spin class -- Bynes told People magazine at the time that she was "doing amazing" and had plans to move to New York to work on her fashion career.

In November 2012, Bynes, who became a regular celebrity snapped by paparazzi, announced that she's a 26-year-old retired multimillionaire.

Around that time, speculation about Bynes' state began to grow as she appeared to share photos from social media accounts that were credited to the star.

Early in 2013, Bynes generated plenty of press with a new look that included long blond hair and apparent cheek piercings. In March, she nearly brought down Twitter when she seemingly sent Drake a lewd tweet.

In April 2013, the same month that Bynes turned 27, the headlines about her behavior were popping up almost daily. The news typically revolved around her reported Twitter account, where self-portraits and unsettling statements were shared.

Between her tweets and her attention-grabbing appearances in NYC, it is easy to forget that Bynes also has legal issues. She was sentenced to three years of probation for her suspended license case in early May. On May 23, she was arrested in New York after allegedly tossing drug paraphernalia out of the window of her apartment.

Bynes and attorney Gerald Shargel arrive for a court appearance in New York on July 9, 2013. She was charged with reckless endangerment and attempting to tamper with physical evidence. The case was later dismissed.

Bynes uses her dog to block her face from photographers while shopping in Chelsea on July 10, 2013, in New York City. On July 24 of that year, Bynes was detained for a mental health evaluation after being "involved in a disturbance in a residential neighborhood" in Thousand Oaks, California. She was then placed under an involuntary psychiatric hold for four months.

In December 2013, Bynes was released from an inpatient treatment facility into her parents' custody, and that same month made her first public appearance on a walk with her parents.

At the start of 2014, Bynes seemed to want a fresh start. She deleted all old tweets from her Twitter account, and instead began posting about her enrollment at the Fashion Institute of Design and Merchandising in Los Angeles. Yet by September, Bynes' was again arrested on a DUI charge. There were also more reports of bizarre behavior.

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• Doctors must decide if they want Bynes kept on an involuntary psychiatric hold


• An administrative referee would hold a hearing at the mental hospital this week


• Bynes claims her father had a microchip implanted in her brain


• The actress was admitted to a California hospital Friday

Los Angeles (CNN) -- Amanda Bynes' claim that a microchip implanted in her brain made her tweet bad things about her father could be key evidence in keeping the actress in a mental facility, according to experts.

Bynes, 28, was admitted to a Pasadena, California, facility on an involuntary emergency psychiatric hold Friday, but a probable cause hearing must be held this week if her doctors want to keep her there.

Her admission to Las Encinas Hospital came hours after Bynes posted a series of tweets alleging her father verbally, physically and sexually abused her. However, she disavowed responsibility for the accusations in a tweet a short time later: "My dad never did any of those things The microchip in my brain made me say those things but he's the one that ordered them to microchip me."

My dad never did any of those things The microchip in my brain made me say those things but he's the one that ordered them to microchip me

— amanda bynes (@amandabynes) October 10, 2014

Bynes then boarded a flight from New York to Los Angeles, where she told reporters at the airport that she was there to file a lawsuit against her parents.

While she was told that a limo driver was taking her to a lawyer's office in Pasadena before going to a West Hollywood hotel, she was instead driven to the hospital -- which resembles an office park -- where her parents' lawyer was waiting for her.

"In a perfect world, one would be honest about getting a person into a psychiatric hospital, but from her past behavior we have seen that Amanda Bynes avoids psychiatric hospitals at all cost because she doesn't believe that she's sick," Dr. Carole Lieberman, a Los Angeles psychiatrist who has followed Bynes' story, told CNN on Sunday.

Amanda Bynes' Twitter rant

If the psychiatrists at Las Encinas Hospital decide to extend Bynes' involuntary treatment beyond the initial 72 hours allowed for evaluation under California's "5150" law, they must convince a mental health referee that she is "a danger to self, to others or is gravely disabled," Lieberman said.

There does not have to be any expressed desire to kill herself, but the doctors need to show evidence that her behavior was so dangerous that it "presented a risk to herself, if not others," Lieberman said.

One reason for keeping psychiatric patients on an involuntary hold is if they are "having auditory hallucinations" or they are "responding to internal stimuli," according to guidelines on the Los Angeles County Superior Court website.

Unless Bynes volunteers to stay in treatment, the doctors must make their case, according to attorney Wendy Patrick. "They can't just make up evidence. It has to be true and observable. The hearing is not just a rubber stamp."

The ups and downs of Amanda Bynes

Her tweet about a microchip forcing her to write negative things about her father would not be the only potential evidence, based on her very public history of odd behavior and several criminal charges.

Bynes was arrested on a DUI charge in Sherman Oaks, California, last month. Her arrest report noted a "disheveled appearance."

Her last several days in New York included an incident at a clothing store in which security officers accused her of shoplifting. She was let go after signing a "no-trespass agreement," TMZ reported.

Bynes was charged with a hit-and-run in 2012, hospitalized for treatment last year after a psychological evaluation and put on probation after a DUI earlier this year.

And she was arrested after allegedly tossing drug paraphernalia out of the window of her New York apartment in May 2013.

This is the second time Bynes has been placed under an involuntary psychiatric hold. The previous instance came in July 2013 after she was "involved in a disturbance in a residential neighborhood" in Thousand Oaks, California. She eventually entered an inpatient psychiatric facility and was later released into her parents' custody.

In September: Amanda Bynes arrested on DUI charge

The latest episodes of odd behavior come a year after her parents told CNN their daughter was "making great strides towards recovery" from mental illness.

She enrolled into the Fashion Institute of Design and Merchandising in Los Angeles at the start of 2014, but she dropped out in the summer.

Bynes' parents will not be allowed to attend the administrative hearing, which would be held at the hospital, unless their daughter invites them, according to court guidelines. They have not publicly indicated if they will ask a judge to give them legal control of their daughter under a conservatorship.

Lieberman said if Bynes is returned to a conservatorship under her parents, as was done last year, they need to work with a psychiatrist to "work out the family dysfunction."

People magazine reported in 2012 that Bynes tried to emancipate herself while still a minor, though she never moved out entirely.

CNN's Todd Leopold contributed to this report.