Here is a look at the two charges against Mr Bostian ---
"A person is guilty of involuntary manslaughter when as a direct result of the doing of an unlawful act in a reckless or grossly negligent manner, or the doing of a lawful act in a reckless or grossly negligent manner, he causes the death of another person."
http://www.legis.state.pa.us/cfdocs/leg ... &subsctn=0" onclick="window.open(this.href);return false;
"a lawful act in a reckless or grossly negligent manner" would be the key here.
"Recklessly endangering another person.
"A person commits a misdemeanor of the second degree if he recklessly engages in conduct which places or may place another person in danger of death or serious bodily injury."
http://www.legis.state.pa.us/WU01/LI/LI ... 0.027..HTM" onclick="window.open(this.href);return false;
"reckless" being the key here.
More from Title 18 ...
"A person acts recklessly with respect to a material element of an offense when he consciously disregards a substantial and unjustifiable risk that the material element exists or will result from his conduct. The risk must be of such a nature and degree that, considering the nature and intent of the actor's conduct and the circumstances known to him, its disregard involves a gross deviation from the standard of conduct that a reasonable person would observe in the actor's situation."
This is what the DA was relying on when he refused to press charges: "consciously disregards". The DA did not believe that Mr Bostian's actions could be proven to be conscious. For example, if a person made a decision to concentrate on a radio discussion or recent traumatic event instead of paying attention to where their vehicle was.
The end result of this charge will be how the Pennsylvania court system handles "consciously disregards". "I don't remember the accident" seems to be a perfect defense when there is no hard evidence of a conscious decision (such as cell phone use or drug/alcohol use as in other incidents). So don't forget ... if you do something in Pennsylvania that may be considered "reckless" forget what you did - it is the perfect defense.
And while I have PA law open -- grossly negligent
"A person acts negligently with respect to a material element of an offense when he should be aware of a substantial and unjustifiable risk that the material element exists or will result from his conduct. The risk must be of such a nature and degree that the actor's failure to perceive it, considering the nature and intent of his conduct and the circumstances known to him, involves a gross deviation from the standard of care that a reasonable person would observe in the actor's situation."
This one may be easier to prove. Is operating a train at 106 MPH into a 50 MPH curve "a gross deviation from the standard of care"? Should he been aware of the risk that existed from his conduct? He lost situational awareness. He failed to perceive the danger and avoid it.