German authorities have arrested an 81-year-old man in connection with the 1994 sexual assault and murder of 24-year-old American student Amy Lopez in Koblenz. Advances in DNA technology led to the breakthrough after more than three decades. The suspect's DNA matched evidence from Lopez's clothing, following a renewed investigation.
In 1994, the body of Amy Lopez, a 24-year-old student from Texas, was discovered by children near the Ehrenbreitstein Fortress along the Rhine River in Koblenz, Germany. The corpse was partially nude and showed severe head wounds; she had been strangled, struck on the head with a stone, and stabbed multiple times.
The case remained unsolved for 32 years until recent DNA advancements prompted a reopening. Last August, Koblenz police formed a unit dedicated to cold cases, re-examining Lopez's clothing and analyzing about 1,600 samples. In 2024, authorities offered a 2,500 euro reward for information after identifying a male DNA trace. Tips increased following a 2023 episode of the true crime program "Aktenzeichen XY."
The suspect, now 81, had his DNA on file from a 1999 conviction for attempting to rape a 16-year-old girl in Koblenz, resulting in a seven-year sentence. Although the genetic data was later deleted, police obtained a new saliva sample from him at a retirement home, which matched DNA found inside Lopez's jeans.
Chief Public Prosecutor Manfred Mannweiler stated, "Methods have improved since the crime. What is possible today would have been less so in 1994." He added, "There was a nagging fear gnawing at everyone that the case might never be solved. There's relief that we might solve it now." Police informed Lopez's father of the arrest on Monday.
Mannweiler emphasized, "This case should make it clear to everyone that law enforcement authorities do not rest as long as a serious crime remains unsolved. Such cases are not forgotten. Not even after 32 years."
Senior detective Friederike Manheller-Sander noted, "Behind every case there is a person whose life was taken too soon. Our commitment is to do everything possible to find answers."
The suspect is held in pretrial detention in Rhineland-Palatinate on suspicion of premeditated murder.
