Langsch went to the woman’s home Oct. 5 and, using a bottle of holy water, anointed the woman’s chest, the court document said.
A moment later, however, he pulled out a bottle of lotion and began applying it to her breast, the Statesman reported.
"The document said Langsch massaged the woman's breast, pinched her nipple and asked, 'Does that feel good?'" the Statesman reported.
The affidavit stated Langsch also tried to put his hand down the woman’s adult diaper, the newspaper reported.
According to Austin police officials, the woman, who reported the incident five days later, told detectives she felt like a “nasty, dirty piece of meat,” the affidavit said.
Charges against Langsch were delayed for several months due to complications with the woman's health. On March 13, she was well enough to pick the priest out of a photo lineup, the Statesman said.
Langsch was arrested the following day and booked into the Travis County Jail, from which he has since been released on $15,000 bond.
If convicted, Langsch could be sentenced to a year in jail and fined up to $4,000.
CBS Austin reported that investigators are trying to determine if there were other victims.
“We would greatly encourage any victims in the Austin area to call 911 or 311 and file a report if they have been a victim with this suspect or any other suspect,” Austin police Detective Steven McCormick said during a news conference.
Officials with the Diocese of Austin said in a statement March 21 that they learned of Langsch's arrest March 16. They describe him as a member of the Schoenstatt Fathers, a religious community from Germany.
"(Langsch) came to the Diocese of Austin in November 2015 with his community and has only served at St. Paul Parish, which is staffed by Schoenstatt priests," the statement from the diocese said. "In February, the Schoenstatt Fathers and the Diocese of Austin received an unrelated report that Father Langsch had failed to maintain proper boundaries with an adult.
“That report did not involve any physical contact.”
Langsch was asked to resign from St. Paul Parish at that time, the statement said. He has since been relieved of his duties in the diocese.
"The Diocese of Austin remains committed to cooperating fully with the police in all investigations of this nature," the statement said. "If you have any information related to this matter, please bring that information to the police as soon as possible.
“We ask your prayers for all involved.”