MINEOLA - A man accused of causing the death of a Nassau County police officer has pleaded not guilty.

James Ryan pleaded not guilty to upgraded charges, which now include aggravated vehicular manslaughter and vehicular assault. Ryan was already facing DWI charges.

Prosecutors say Ryan was drunk when he caused a crash, left the scene and then caused a second accident that injured an off-duty New York City detective. Officer James Olivieri was struck and killed while responding to those crashes.

In court, prosecutors asked that Ryan's bail be raised to $200,000, but his attorney successfully argued that there was no justification for that because Ryan has made every one of his court appearances. Ryan's attorney also argued that his client is not directly responsible for Olivieri's death because another driver struck and killed him.

The judge allowed Ryan to remain out on his current bail. He is due back in court April 29.