Bissett told ET that she know Locklear 'will be able to get through' her recent struggles with the law.
The development comes just over a month after Locklear was arrested and charged with four counts of battery on an officer.
The 'Melrose Place' star is continuing treatment.
On Tuesday, Locklear was temporarily banned from having a gun. She also learned she's facing some serious charges, and could face one year behind bars for each count.
A source tells ET that the 20-year-old actress wants her mom to get the help she needs.
The source tells ET that Ava 'went away with her father,' Richie Sambora, to 'get a break from it all' after her mom entered rehab.
ET has obtained the search warrant cops got days after the actress' February 25th arrest.
The actress claimed her boyfriend choked her in a search warrant obtained by ET on Friday.
A source tells ET the 'Melrose Place' star has entered a treatment facility following her February arrest for one count felony domestic violence and three counts misdemeanor battery on a police officer.
A source tells ET that the actress is 'getting the help she finally needs.'
The 56-year-old actress is facing charges of felony domestic violence and battery on a peace officer after a Feb. 25 incident at her Thousand Oaks home.
The 56-year-old actress is accused of striking her boyfriend and three police officers.
ET has learned that the 56-year-old contractor was arrested around 12:43 a.m. by the California State Highway Patrol.
The 56-year-old actress was arrested after a domestic disturbance call was reported on Sunday.
