JAIPUR, India — Three months after an angry mob beat to death a Muslim man in the state of Uttar Pradesh after rumors that he had slaughtered a cow and consumed its meat, a preliminary investigation has found that the meat retrieved from his home was goat.

A handwritten report, dated Sept. 29, by a doctor at the Government Veterinary Hospital in Dadri, near the village of Bisada, where the victim, Mohammad Ikhlaq, lived, said, “It seems that this meat belongs to goat progeny.” The meat has been sent to another lab in the state for a final forensic test.

The findings were submitted with formal charges filed in a court in Gautam Budh Nagar District last Wednesday against 15 men in the village accused of murder and attempted murder, among other crimes. All 15 have been arrested.

The findings, which were initially reported by the local news media on Monday, were made available to The New York Times by Yusuf Saifi, the lawyer for Mr. Ikhlaq’s family. He said the examination was conducted in late September, when the police registered the case, but was submitted only when formal charges were filed last week.