Updated at 4:59 p.m. Dec. 3: Revised to reflect that police say the rape suspect killed Maria Ezquerro.

A 15-year-old arrested last week in connection with three Dallas rapes also killed a 23-year-old woman at her Far North Dallas apartment, police say.

DNA evidence linked the teen to the slaying of Maria Ezquerro, police said Monday.

The juvenile suspect was taken into custody without incident around 7 p.m. Thursday and booked into the Henry Wade Juvenile Justice Center, police said. His name is not being released because of his age.

The teen invoked his right to remain silent after his arrest, police said.

He had not been on police's radar until last week, Deputy Chief Thomas Castro said at a news conference Friday. Castro said "some technology" led authorities to the teen but did not elaborate on how he was identified.

Castro said authorities hope to have the juvenile certified to stand trial as an adult.

Authorities found Ezquerro dead from "homicidal violence" at her apartment in the 5400 block of Peterson Lane around 9 p.m. Tuesday.

Castro said Friday that Ezquerro was texting an acquaintance around 7:40 p.m. when she mentioned that a man came to her door and asked to use the phone. She stopped texting, and the acquaintance called 911 a short time later.

Police had not determined whether she had been sexually assaulted, Castro said.

In each of the Dallas rapes, the attacker knocked on the victim's door and asked for work or money. He then sexually assaulted the women after forcing his way into their homes and brandishing a weapon.

The most recent attack took place Oct. 30 at the Wildflower Apartments in the 6000 block of Pineland Drive in northeast Dallas. A child home at the time of the assault was unharmed, police said.

The previous two assaults took place at apartments less than a mile apart in Far North Dallas -- on Sept. 12 in the 14200 block of Dallas Parkway and Sept. 19 in the 14100 block of Montfort Drive. Both victims were in their 20s.

Police said that DNA and physical evidence from those crimes link them to two similar sexual assaults committed in Bossier City, La., in March and April.

He will face charges in the Louisiana rapes, police said Friday.

Anyone with any information about the cases is asked to contact Detective Todd Haecker at 214-671-3610 or todd.haecker@dpd.ci.dallas.tx.us. People who wish to remain anonymous can call Crime Stoppers at 214-373-8477.

Staff writer Cassandra Jaramillo contributed to this report.