MONROE TOWNSHIP - Police say they have upgraded the charges against a Monroe Township man after his father was found dead in their home.

Andrew Grossman, of 32 South Rhoda St., was charged with murder after the medical examiner determined his father, Ronald, died of blunt force trauma. The 65-year-old suffered head, back and neck injuries.

Grossman was pronounced dead early this morning after police obtained a warrant to search the home. The investigation began after police received calls from one of the victim's friends, who became concerned after he couldn't get in touch with him.

Andrew Grossman remains in custody in lieu of $1 million bail. Earlier today, he was charged with tampering with evidence and hindering the investigation.

Anyone with information on the death is asked to call the Monroe Police Department at (732) 521-0222 or the Middlesex County Prosecutor's Office at (732) 745-4018.