A 20-year-old Montgomery County woman who once worked as a nanny in Lancaster County is now headed to county court, accused of repeatedly injuring a 7-month-old girl left in her care. Prosecutors say Tiffany Lynn Cooper waived her preliminary hearing on Tuesday, clearing the way for the case to move deeper into the court system on felony charges.
According to the Lancaster County District Attorney's Office, as reported by Fox43, the infant suffered nosebleeds and bruising on her face, hips, chest and abdomen. Prosecutors allege the injuries happened multiple times between September and November 2025 at the family's home on the 100 block of Peregrine Place in Brecknock Township. Cooper is charged with aggravated assault and endangering the welfare of children and is free on a $50,000 unsecured bond, according to the DA's office.
The baby’s 2-year-old brother told investigators that Cooper “slapped him and pulled his hair” and that she hit the infant, according to court documents. A doctor who reviewed the girl’s injuries told prosecutors that “the injuries could only have been caused by physical abuse,” as reported by Fox43. Charging papers state that the infant’s parents have since fired Cooper.
Local coverage indicates this case is part of a troubling pattern in Lancaster County. Prosecutors and hospital staff have flagged a series of serious infant-injury investigations this year, and reporters have linked several of those to county-level prosecutions, underscoring the strain on legal and child-welfare systems. As one recent local package framed it, a Lancaster baby horror earlier this spring led to similar county charges.
Legal Status and Next Steps
Cooper is accused of offenses that can be treated as felonies depending on the level of harm and whether prosecutors establish a pattern of conduct. Aggravated assault is defined in 18 Pa.C.S. § 2702, and endangering the welfare of children appears in 18 Pa.C.S. § 4304. By waiving her preliminary hearing, Cooper allowed the case to bypass an early evidentiary test and move toward formal arraignment in the Lancaster County Court of Common Pleas, a procedural step outlined by the state judiciary (Pennsylvania Courts).
What’s Next
From here, prosecutors will present evidence in county court as the case proceeds through arraignment and later hearings. Cooper is presumed innocent unless and until proven guilty, and upcoming court dates and filings will be set out on the official docket as the matter moves forward.
