PHOENIX — Police in Phoenix are seeking more information about a man accused in the killings of two girls in Tucson who's also suspected in burglaries.
Christopher Matthew Clements is a convicted sex offender who pleaded not guilty in September to charges stemming from the deaths of 6-year-old Isabel Celis and 13-year-old Maribel Gonzalez.
Celis disappeared in April 2012 and her remains were found last year. Gonzalez's body was found in 2014 in the same remote desert area.
Phoenix police say Clements was arrested for residential burglary in Tucson in January 2017 and he also has been linked to burglaries in Phoenix and Litchfield Park.
Investigators have determined Clements visited the Phoenix metro area on numerous occasions from 2011 to 2016 and they're trying to track his activities from that timespan.
April 21, 2012
In 2012, 6-year-old Isabel Celis went missing from her midtown home. The incident happened at night as the family slept. No one heard any sounds.
Isabel's father, Sergio, reported Isabel missing the following morning on April 21, 2012, after searching for her with her two older brothers.
They found her bedroom window open.
Her disappearance shook the city of Tucson, as the community united to help find her. Tucson police received thousands of tips throughout their investigation.
June 3, 2014
In June of 2014, 13-year-old Maribel Gonzalez told her family she was going to visit a friend.
When Maribel didn't come home the following morning, her mother called the friend who told her that Maribel never arrived.
Maribel was reported missing and was initially treated as a runaway, Arizona Daily Star archives show.
Maribel's home was said to be minutes away from Isabel's.
June 6, 2014
Just a few days later, Maribel's body was found in a desert area northwest of Tucson, near North Trico and West Avra Valley roads.
There were no suspects at the time.
March 31, 2017
Years after Isabel went missing, her remains were found northwest of Tucson — in roughly the same area as Maribel's body.
Police Chief Chris Magnus informed the public of their discovery on March 31, 2017, though the remains were found earlier in the month.
Officials remained tight-lipped about the case and would not discuss how investigators were led to Isabel's remains.
September 14, 2018
On Sept. 14, 2018, 36-year-old Christopher Matthew Clements was indicted. He is accused of killing both Isabel and Maribel.
Authorities announced the indictment the following day, Sept. 15. They revealed that in 2017, FBI agents received a tip about a man who might know more information about Isabel's disappearance.
Clements, a convicted sex offender, was the man.
After speaking with Clements, investigators were able to find Isabel's remains.
Clements is facing 22 charges that include two counts of first-degree murder, two counts of kidnapping of a minor under age 15, burglary, and 14 counts of sexual exploitation of a minor, which is said to be related to child pornography.
He is currently being held in the Maricopa County jail on unrelated charges.
Records show that Clements has a long criminal history and that he was out of jail on bail when Maribel was killed.
September 21, 2018
On Sept. 21, 2018, the Star obtained new court documents showing that Clements led investigators to Isabel's remains after asking for unrelated burglary charges to be dropped.
He also asked that his impounded car be released. Investigators agreed to his terms.
The same court documents show that DNA taken from Maribel's body was linked to Clements.
They also say that investigators found a letter from Clements that implied there were four bodies left in the desert area.
Investigators also found schoolwork and a child's purple sweater in the home of Clements' girlfriend. Sexually explicit photos of children were found on a computer, in addition to internet searches such as "child killer found not guilty" and "body found in desert."
September 24, 2018
Clements pleaded not guilty in a court appearance at Pima County Superior Court on Sept. 24, 2018.
Families of Isabel and Maribel were in the courtroom for the video arraignment.
Clements appeared to have a black eye. The week prior, officials confirmed that he had gotten into a fight with two other inmates at the Maricopa County jail.
February 11, 2019
On Friday, Feb. 8, the county attorney's office filed notice that they would be pursuing the death penalty.
On Monday, Feb. 11, Judge Deborah Bernini said she would be drafting up a document to address pre-screenings, which includes an IQ screen.
"We don't take five years to try death penalty cases here like they typically do in Phoenix," Bernini told Clements' lawyers, Eric Kessler and Joseph DiRoberto, adding that she wanted to give them adequate time to file an objection to the pre-screening.
The hearing addressed several other items, including the state's motion to appoint a special master to review recordings of dozens of recorded jail phone calls between Clements and Tucson attorney John Kaufmann, who represented Clements in a 2012 case.