mystery missile may have been an errant launch?

Los Angeles Times article suggests, according to aerospace experts, mystery missile "...appeared to be an errant missile launch." The article from last Tuesday reported Pentagon's cryptic response to the fiery incident, "...[Pentagon] officials said the event was not a threat to national security. They also said it was not a launch by a foreign military... Each branch of the military has denied involvement..." Aerospace experts "...believe it originated near Naval Air Station Point Mugu in Ventura County, where missiles and missile defense exercises are regularly carried out... The military also operates a floating ocean platform and regularly carries out tests at San Nicolas Island, one of the Channel Islands." Aeropace experts shared their opinion after viewing the video on what could have been the source of the plume, "...a large military rocket or missile." An errant missile launch is a possibility.