A former medical doctor at Lancaster General Hospital was sentenced to three to nine years in state prison after he pleaded guilty this week to sending inappropriate messages to a 13-year-old girl, including images depicting child pornography.

Judge Merrill Spahn sentenced Frank Yang Liu, 34, after he pleaded guilty April 21 to eight different felony offenses including possessing child pornography and soliciting minors online.

Liu sent the inappropriate messages to the victim between August 2023 and June 2024 despite being aware of her young age.

In an interview with police Liu admitted to using social media to message what he described as “girl accounts” without his wife’s knowledge. Liu described his actions as “interactive porn” to fulfill a “kink” or “fantasy” and said the young girls he messaged were dressed “scandalously.”

Throughout their conversations Liu made several inappropriate comments to the victim, including explaining his sexual interests in an “age gap” and stating that he had masturbated to pictures she had sent him. Liu also sent the victim nearly a dozen pornographic images of nude females to the victim, at least one of which appeared to be of a prepubescent female. 

At one point in the conversation Liu asked the victim is she would be “up for meeting.” On another occasion, Liu asked the victim if she could “make content” with her friend. 

Police seized numerous electronic devices from Liu’s residence in the 1200 block of Carole Lane in Penn Township while executing a warrant there in June 2024, uncovering more than 100 videos depicting nude children.

Investigators began looking into Liu in March 2024 after an agent with the FBI’s Child Exploitation and Human Trafficking Task Force identified him as having sent child pornography online. 

Assistant District Attorney Jessica Collo prosecuted the case.

Northern Lancaster County Regional Police Det. Theresa Stauffer filed the charges.