Dr. Conrad Murray Trial -- EMT: We Could Have Saved Michael Jackson

One of the paramedics who rushed to save Michael Jackson's life at 100 N. Carolwood Drive just testified ... if Murray had called 911 immediately, Michael Jackson's life might have been saved.

Richard Senneff said Murray told him he called 911 the second he realized MJ was in distress, when in fact there was an approximate 20-minute delay.

According to Senneff, had Murray called earlier there was a good chance EMTs could have restarted Michael's heart.

Senneff also claimed Murray never mentioned Propofol while he was on the scene -- in fact, Senneff said, Murray patently denied MJ was on any medication whatsoever. Eventually, Murray claimed he had given MJ a sedative, Lorazepam.

Senneff said MJ was already dead when he arrived at the scene -- but they tried to revive him for 47 minutes to no avail. He said Murray refused to let them declare a time of death.