I'll be looking at it from the point-of-view of "Professionally-Trained International Terrorists", or at least that's what our team was called on the news.
The first decision was whether to leave an injured person behind and the choice we made, and we were supposed to make, was leaving him behind.
Let's say you could have healed poor Bob enough that the upcoming hospital bill wouldn't have left his wife and kids living on the street. The SecCorp investigators are going to be really interested in why a bunch of criminals spared *him*: possibly an "inside man", maybe an accomplice, but definitely someone to pump for info about your team. They won't be gentle about it, and his employer won't be "understanding". Congrats on ruining several lives.
So maybe you can't leave him behind. Is he conscious? Is he recording everything for a later reward? Every minute he's with you means the odds of providing a positive ID increases. If he doesn't sell you all out once he gets loose, he's now stuck living in the Shadows like you lot.
Or you could just put a cap in his .... That comes out to a few more seconds delay on the escape, another round for Forensics to analyze, another charge on your growing rap sheet. AND his wife and kids, one of who may need Corp-provided chemo, are out on the streets without his income.
Unless the vic's a mage and inherently in need of geeking, maybe you should just walk away. You're already at the point that Emergency Services are en route, and there's no other good solution.
Our team: notably screwed up and left a magician alive, behind, and very happy to cooperate for reduced sentencing. That nearly led law enforcement right to us.
The next choice was whether or not to leave a teammate behind. I convinced everyone we should find a way to stick together. This resulted in the GM rolling for a random person to get shot, ended up being me.
Will this teammate understand the necessity and take the rap for your team?
If not, you have compromised your team and possibly anyone associated with you.
IF your luck is very good, please say "Hello" to Officer Friendly when he comes knocking at your door.
On the other hand, remember that no matter how justified you are in stiffing one of your own, it may be extremely corrosive to morale afterward. Even a saint would have second thoughts about turning his back on you.
Our team of misfits: The adept that was assensed on the Lansing job, he ended up injured and separated from the team on another job. Instead of going to ground, he got himself caught. Then he killed innocent people trying to break free. See how being nice to one person can turn out very badly?
So, someone may have ended up emphasizing his mental instability and combat abilities and escape route to the law enforcement personnel en route. And, someone else may have dropped a vehicle from the parking garage onto him. We're still not sure who ordered the car to roll back and forth over the body a few times just to make sure.
Finally we had the choice to let a non-combatant live or die. The team killed him but after the session we were told that was the wrong choice.
Unlike the others, was this person a loose end that put you at risk?
Was this person someone for whom others would find a reason to avenge?
He wasn't a police/security officer, was he (that's asking to get the whole team messily dead)?
Many people DO draw the line at involving innocent bystanders, whether from operational security or from moral restraint. You can heal the injured, break out a captured teammate, but you cannot return a soul to life.
So I was wondering if I should listen to him and start being more cold hearted about my choices?
Yes. No. Maybe? Magic 8-Ball say, "Reply hazy try again"
That's not so much the Shadowrun game or the setting, but the mindset of the characters making up the team. Sure, there are laws that are in turn unevenly enforced. There are even things that make or break reputations (Street Cred, Notoriety, Public Awareness). That all goes into deciding what the logical
consequences should be for your
actions. What choices are morally acceptable for you - that's for you to decide, and may be very specific to your character's background.