As a 4-year-old girl cried for her mother, investigators allege Kyle Thompson responded “Your mommy can’t save you!”

Thompson, of Montgomery County, Md., is accused of horrendous sex crimes against a trio of children under five years old, WUSA 9 reported Friday.

The 31-year-old is charged with multiple sex abuse crimes after allegedly filming himself having sex and molesting the children.

The FBI believes the accused sicko had been befriending young mothers since 2013 with the intent of violating their children, according to the report.

An investigation into the allegations against Thompson began after an anonymous source tipped off police to the videos.

One of them allegedly showed a girl’s arms being bound by a belt as Thompson performed a sex act, according to court documents.

Those documents also claim Thompson attempted to molest of one his alleged victim’s older sisters, who escaped his grasp.

A search of Thompson home allegedly turned up child porn and a cache of registered weapons, the New York Daily News reported. Investigators believe Thompson used those weapons to intimidate his victims.

Upon his arrest, Thompson denied knowing the young girls, and claimed he’s innocent of the appalling charges he faces – multiple counts of sex abuse of a minor, a first degree sex offence, and a third degree sex offence.

He remains behind bars.