Keep it. Don’t reply to it. If it’s real, and they need you, law enforcement will physically reach out to you.
If you know you didn’t do anything illegal, your account or profile may contain information that can be used to prosecute someone else, who has already shown probable cause, so an investigation can now start.
If you think something went down that may be illegal and you may be seen as a part or accessory to, check Contra Costa county’s arrest warrants (most sheriff’s departments post outstanding warrants online) and check them for your uber driver’s names and see if any photos look familiar. Check for your own name. If your own name is on there and you know you shouldn’t be, contact an attorney to resolve. Do NOT walk into a police station.