Police initially linked seven deaths and nine shooting incidents over a four-month period to the Phoenix Serial Street Shooter.
Saucedo was first taken into custody on April 19 for the murder of 61-year-old Raul Romero, who was shot multiple times on August 16, 2015 in the driveway of his home, according to ABC15.
She described him son as a noble person who studied and worked hard and was loved by everyone he knew. She said he was never a trouble-maker and preferred playing basketball with friends over partying.
Smith was pregnant with the couple's child when Verdugo-Sanchez was fatally shot.
Smith said she had grown frustrated over the past year as detectives kept her in the dark about the investigation.
Police on Monday announced the arrest of a 23-year-old suspect in connection to the Serial Street Shooter case in Arizona in 2016.
Police say they don't know what motivated Saucedo and that he didn't have any connection to any of the eight people who were killed.
A survivor of one shooting told News 12 that after police showed up at his home with photos, he recognized Saucedo's face.
Investigators initially believed a serial shooter was responsible for seven deaths a year ago, but in recent weeks they determined two other victims - the one killed in August 2015 and another person slain in January 2016 - were shot by the so-called "serial street shooter" who they believe to be Saucedo.
Saucedo was a bus driver for the city of Phoenix through a temp agency for several months in July through August 2015, Phoenix police said. Police say tips from the community resulted in his arrest.
The gunman who terrorized Phoenix a year ago with a series of seemingly random shootings - killing nine people in four months - is behind bars, police said Monday. Authorities investigated Saucedo more closely and connected him to the serial killings.
There were no witnesses to the shooting itself, but police were able to locate the murder weapon, and determined casings at the scene were from a gun Saucedo had sold to a Phoenix pawn shop.
They also tied Saucedo to the January 2016 murder of 22-year-old Jesse Olivas - and seven other fatal shootings already identified as part of the pattern, police said.
The Maricopa County prosecutor said his office hadn't yet decided which charges they would bring to trial.
Another series of shootings a year ago put Phoenix on edge, but Williams said there's no evidence to connect Saucedo to the I-10 Freeway Shootings.
A man was arrested Monday in a string of serial killings that rattled a Phoenix neighborhood past year, marking a major break in a case that involved nine deaths and a dozen separate shootings.
The next shooting didn't happen until April 1, 2016, when Verdugo-Sanchez was fatally shot.
Shots were fired into a auto on July 11, 2016; a man and a 4-year-old boy inside escaped unhurt.