Final answer:
Auditor Mueller had a duty of care to Alex, and negligence in this duty led to Alex's financial losses when he relied on the faulty audit report to invest in X Company. This negligent act may hold Mueller liable for damages.
Step-by-step explanation:
Yes, auditor Mueller owed a duty of care to Alex.
In cases of financial statements audit, auditors must adhere to standards of due diligence and care to not only their client but, under certain circumstances, also to third parties who may rely on the auditor's report for making financial decisions.
An auditor has the responsibility to conduct the audit with professional skepticism, and they must take reasonable steps to detect inaccuracies or fraud.
In this case, Mueller's negligent behavior led to Alex making an investment decision based on an inaccurate report. The law recognizes that auditors could be liable for negligence if they fail to exercise the care that a reasonably prudent auditor would use under similar circumstances, and there is a proximate cause relationship between the auditor's negligence and the plaintiff's (Alex's) losses.
Alex's action against Mueller would center on proving that Mueller breached this duty of care, resulting in Alex suffering damages when the truth about the Company's finances was revealed.