"First, the DA was under pressure to bring charges once the sheriff's department jumped the gun and arrested Kobe."
I've worked for two prosecutorial agencies... never have they felt pressured to charge a case just because an arresting agency makes one...
Maybe you haven't, but it's not in doubt that the sheriff did an end run around the DA's office, going to a judge to get the arrest warrant instead of following the usual practice in that district of going through the DA. Here's the transcript of an interview the DA gave soon after the arrest...
"HURLBERT: Whatever was said about the sheriff's department and about the way the warrant was done, what's done is done. Nothing illegal was done. Nothing improper was done. And I want to look forward in this. I want to look forward and not backwards. And I support the sheriff, the sheriff's department, their investigators in this investigation"
Does that sound like someone who is happy about having this case, or someone trying to make the best of a situation not of their choosing?