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.

The calls also included one at 1:08 p.m., which other witnesses said was made from the ambulance containing Jackson, to Nicole Alvarez.

Alvarez, a 29-year-old actress, also stood the stand to testify that she developed a personal relationship with Murray.

The King of Pop, who was rehearsing for a series of comeback concerts in London, was found unresponsive in his rented Holmby Hills estate. He was proclaimed dead after being ambulanced to the Ronald Reagan UCLA Medical Center about six-minute drive from his estate.

The Los Angeles County coroner’s office ruled that the pop icon died from an acute propofol intoxication. The potent sedative is usually administered in clinical and hospital settings for sedating patients.

Prosecutors contend that Murray failed to tell paramedics or doctors that he had administered propofol to the singer and took steps that were an “extreme deviation from the standard of care.” They also contend Murray and security personnel collected drug vials and other materials from the room before calling 911.

The hearing, which began Tuesday, was held to help Los Angeles Superior Court Judge Michael Pastor to determine if there is enough evidence for Murray to stand trial on the involuntary manslaughter charge. If convicted, Murray could face four years behind bars.

The process is expected to last seven to eight days. Between 20 and 30 witnesses are expected to be called by the prosecution.