A Houston cocktail waitress made her testimonies in a preliminary hearing held in a Los Angeles courthouse Friday, with prosecutors contending Conrad Murray, late Michael Jackson's personal physician, ignored him when making a series of telephone calls and texting after administering a potent sedative on the pop icon.

Sade Anding, whom Murray referred as his girlfriend, testified that Murray called her on June 25, 2009, the day when the 50-year-old King of Pop died.

Murray, 57, the cardiologist who was paid by Jackson 150,000 dollar a month to take care of him, was not on the line about five minutes into the conversation, Anding said, adding she heard a commotion and coughing, mumbling of voices.

According to the waitress, who was in Texas, she eventually hung up the phone, and tried to call Murray back and send him text messages, but he never responded.

The two met each other when Anding was working at a Texas steakhouse in February 2009, and exchanged phone numbers.

In the preliminary hearing, Los Angeles police Detective Dan Myers testified that Murray had made or received 11 calls totaling just under 90 minutes between 7:01 a.m. and 11:51 a.m. in the morning when the singer died.

These included a 32-minute call to his practice in Las Vegas and an 11-minute one made just before the doctor called Jackson's personal assistant at 12:12 p.m. to report that the singer had a "bad reaction," according to cellular phone records presented by Myers. The doctor had two cellular phones under his name.