Here’s an article reviewing an NTSB investigation in which a 34-yr-old EMS helicopter pilot had been texting prior to and during a flight that crashed and killed the pilot, two EMS nurses, and the patient being transferred between hospitals.
Here’s a link to a 4/9/13 abstract prepared by NTSB. This was a patient transfer of roughly 75-miles, from a hospital in Bethany, MO to another hospital in Liberty, MO. An interstate freeway (I-35) provides a direct route for a quick use of a ground ambulance. The NTSB report does not identify if there was a pressing need to use the more expensive (and more dangerous, plus more profitable to the HEMS company) helicopter ambulance instead of a ground ambulance. The pilot knew he was critically low on fuel and took off anyway, planning to land just minutes from the destination hospital to refuel. Fuel exhaustion occurred roughly one mile short of his intended fuel stop.
Here is a link to an earlier aiR POST related to a fatal HEMS crash six months ago: