Bobby Brown's lawyer says singer "was not driving erratically"

(CBS News) Bobby Brown's lawyer is speaking up after the New Edition singer was arrested for suspicion of driving under the influence on Monday in the Los Angeles area.

"Everyone is innocent until proven guilty, and Mr. Brown was not driving erratically," Brown's laywer Tiffany Feder told People. "He was speaking on his cell phone."

"Mr. Brown has not been convicted of anything associated with this incident," Feder added. "Mr. Brown is taking this matter seriously and an investigation is underway. The legal process shall run its course."

A California Highway Patrol officer said Brown, 43, was arrested around 12:20 p.m. Monday after he failed a field sobriety test. The R&B singer was pulled over after an officer saw him talking on his cellphone without a hand-free unit, according to police. He was released about two hours later.

Brown and the late Whitney Houston have a 19-year-old daughter, Bobbi Kristina.

Sources tell TMZ that Houston's mother, Cissy, felt "vindicated" after finding out about Brown's arrest. According to TMZ, insiders say it's the reason she wants Brown to "keep his distance" from Bobbi Kristina.