I'm not 100% sure, Bob, but I think bail would more likely hinge on other factors, like:
1/ His history. Does he have a record of other crimes? Are they serious ones like domestic violence? Or more minor ones like a DUI?
2/ How he actually killed his victim. Did he just put one in the guy's heart? Or did he wound him 14 times before putting the last round in the magazine in his head?
3/ His demeanor. Does he appear remorseful about his actions, or does his attitude shout, "The bastard had it coming!"
4/ His financial situation. If he gets bail, does he have the money to take off for Tahiti? Or is he stuck in town until the trial?
5/ His reputation. Is he well-known and well-liked by neighbors and co-workers? Or are they glad his ass is in a sling?
6/ The judge. Did he boff his mistress last night. Or did his wife refuse him for the 957th night in a row? Is his taco lunch giving him major heartburn? Or did he have to eat unseasoned baked chicken to appease his ulcer? Or was that cheesesteak too delicious to be measured? Does he assume everyone arraigned before him is guilty or the wouldn't be there? Or does he decide each case on individual merit?
The more positive things the guy has going for him (except for his finances, where negative is better), the more likely he is to get bail.
But also check the statutes of wherever your story is set. Some states may have laws that mandate no bail ever in murder cases in which case the judge's hands are tied.