An illegal alien who was indicted for smothering to death more than a dozen elderly women in Dallas is facing the death penalty.

Texas prosecutors will request the alleged serial killer, Billy Cherirmir, be put to death if he is found guilty of capital murder, according to court documents filed by District Attorney John Creuzots office on Tuesday.

Chermirir, 46, reportedly disguised himself as a maintenance employee or healthcare to gain access to the homes of elderly women who resided in senior citizen complexes throughout northern Texas, according to authorities. The illegal alien than smothered over a dozen women to death and took off with their jewelry and other valuables.

In a press conference last week, Plano Police Chief Gregory Rushin cited the alleged crimes Chermir faces, noting the assailant once shoved an elderly woman from her walker and onto the floor.

“Suspect Chemirmir has worked as a health care worker and has a history of impersonating maintenance personnel at a retirement community in Dallas,” Rushin said. “Chemirmir uses his health care experience to his advantage in targeting and exploiting seniors.”

Law enforcement discovered Cherirmir as a suspect after the Kenyan migrant’s attempt to murder two elderly women failed, Dallas Morning News reports.

Chemirir, who is currently in custody in Dallas Count jail with an $11.6 million bail, was apprehended on unrelated charges on an outstanding warrant in March 2018. The break in the case came after police witnessed him disposing of a stolen jewelry box. The jewelry box contained the name of one of Chermirir’s alleged victims, 81-year-old Lu Thi Harris, who was found dead in her home.

Harris was smothered with a pillow into unconscious and robbed, but survived. Paramedics revived her and she told law enforcement the assailant that attacked her had stolen a box containing her jewelry. Police identified Chermirmir by his license plate number and tracked him down days later, when they observed him trashing the jewelry box, according to the affidavit.

Prosecutors are seeking the death penalty specifically in relation to Harris’ murder, while authorities continue investigations into other claims in lawsuits targeting Chemirir. Investigators are reviewing 750 unattended deaths of elderly women for possible links, according to law enforcement officials.

The illegal alien is also facing two counts of attempted capital murder in Colin County for other alleged attacks against elderly women.

The Kenyan immigrant who was living in the U.S. illegally maintains he is not guilty. His attorney, Phillip Hayes, said the charges against Chermirir were a surprise, but Chermirmir “has denied it since Day 1” that he is in any way to Harris’ death.

“They have circumstantial evidence that puts him in the area but that’s as far as the evidence goes,” Hayes said.

 Chemirmir is being held on a charge of being in the country illegally, in addition to the murder charges.