SMOKING GUN IN MICHAEL JACKSON'S DEATH

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A girlfriend of Dr. Conrad Murray's at the time of Michael Jackson's death just established for prosecutors Murray waited around 25 minutes after noticing MJ was lifeless before calling 911.

Sade Anding -- who was in Houston the day MJ died -- testified she received a call from Murray at around 12:30 PM.   It's unclear if she was referring to Pacific or Central time.

But there is only one call in the phone records from Murray to Sade, and that's at 11:51 AM PT.

Sade says Murray was asking her how she was doing and she started talking about her day.  She spoke for a few minutes and realized Murray wasn't on the phone anymore.

Sade then said she heard commotion, as if the phone was in his pocket, and heard "coughing and voices." 

Sade estimates the entire call lasted 5 minutes.

The 911 call wasn't made until 12:21 PM PT, which means -- if Murray did indeed first realize MJ was in distress at around 11:55 AM PT -- there was a long delay in sounding the alarm.

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Source: TMZ / Thanks Juliana & mjcool