11/18/2010 07:21 pm ET | Updated May 25, 2011

Source: Police Now Working Under Theory That Ronni Chasen's Murder Was Planned In Advance

UPDATE: A source tells the Hollywood Reporter that police now believe the murder of Hollywood publicist Ronni Chasen was planned in advance, not a random incident:

According to a Beverly Hills city official who was briefed by Police Chief David Snowden, the department's working theory centers on shots being fired out of another vehicle that pulled up next to the passenger side of Chasen's Mercedes-Benz around 12:30 a.m. Tuesday. It is believed the shooting occurred either as Chasen made a left turn from Sunset Boulevard onto Whittier Drive, or just after the turn was made. Her black E350 coupe traveled southward on Whittier until it crashed into a light pole at Greenway Drive, deploying the driver side airbag. It is believed the shots shattered the passenger side window.

Earlier in the day, former LAPD chief William Bratton discussed his take on the mysterious murder, a case he describes as "a classic Hollywood whodunit". In his discussion with CBS News' Harry Smith, Bratton lays out a number of possible scenarios that he deems plausible in a case that has thus far baffled law enforcement.

(h/t LA Times)