This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated.

NEW JERSEY — A New Jersey man accused of abducting his own 2-year-old son and the boy’s mother last Friday has now been charged with murder after she was found dead over the weekend, officials say.

Tyler Rios, 26, has been charged with first-degree murder in the death of 24-year-old Yasemin Uyar, the Union County Prosecutor’s Office said Thursday.

The new charge is in addition to Rios’ first-degree kidnapping charge for the alleged abduction of his son.

Authorities issued an Amber Alert on Friday after it appeared Rios had kidnapped Uyar and their baby boy, according to authorities.

Authorities found the Rahway boy and his father in Monterey, Tennessee early Saturday morning, however, the mother was still missing. Her body was later discovered in a wooded area nearby, off of I-40, officials said Sunday.

Police arrested Rios and preliminarily charged him in the kidnapping, the prosecutor’s office said at the time.

An autopsy performed on Uyar revealed her manner of death to be homicide, officials said.

According to authorities on Thursday, Rios remained in custody in Tennessee, awaiting extradition back to new Jersey, after which a first appearance and detention hearing will be scheduled.

Uyar’s mother, Karen Uyar, told PIX11 News on Friday that Rios and her daughter had known each other since high school, but they hadn’t been a couple since shortly after their son was born. She said her daughter had been assaulted by Rios multiple times and had a restraining order against him.

“We tried really hard to get Yasemin to leave him but she was trying to coparent with him and he often thought they were getting back together,” Karen Uyar said.

Uyar was planning to move out of her Rahway apartment this weekend to a place where Rios couldn’t find her or their son, according to her mother, who believes that may have been what triggered the abduction.

Anyone with information about the case was urged to contact Prosecutor’s Office Lt. Johnny Ho at 908-403-8271 or Detective Richard Acosta at 908-347-0404.

This story includes reporting from PIX11’s Magee Hickey, Jay Dow, Kristine Garcia and Stephen M. Lepore.