An Iowa man is appealing his life sentence months after being found guilty of trying to abduct two young girls by offering them $100 bills.

The Des Moines Register reports that Jeff Lee Altmayer, 58, is pushing to have his life sentence overturned. Investigators believe Altmayer targeted at least 19 girls—sexually abusing two of them—in nine counties between May 31 and November 16, 2016. The average age of Altmayer’s alleged victims was 10; though he possibly targeted girls as young as 6 and as old as 13, according to the newspaper.

Altmayer is believed to have offered $100 bills to young girls he wanted to get into his car. On one instance, he reportedly approached two 11-year-old girls in Jasper County and offered them $100 each if they would go with him to Des Moines to do some yard work. One girl declined while the other obliged.

It wasn’t long after getting into the car that Altmayer touched the girl’s breasts and genitalia over her clothing. He then instructed her to touch his genitalia. The girl repeatedly demanded to be let out the car, and Altmayer dropped her off at a nearby library, the newspaper reported.

Altmayer is appealing the life sentence he was handed for his role in that incident.

The Iowa man’s reign of terror ended on November 16, 2016, after he was arrested in Onawa for attempting to lure a 6-year-old into his car and claiming to be a police officer. A neighbor who witnessed the exchange followed Altmayer until police got involved.

Many of Altmayer’s victims reportedly described the suspect as being an older man who had curly and/or dark hair, driving a silver car, and handing out $100 bills. The similar descriptions allowed investigators to link Altmayer to multiple incidents occurring throughout Iowa, despite Altmayer having no apparent connection to the counties he would terrorize. Officials decided to file charges in their two strongest cases against Altmayer.

Convicted of second-degree sexual abuse, first-degree kidnapping, and two counts of enticing a child, the Register reported that investigators also suspect Altmayer might have been involved in the 2012 kidnapping and murder of two Evansdale cousins.

Altmayer remains in custody at the Jasper County Jail.

[Featured image: Jeff Lee Altmayer/Jasper County Jail]