EL PASO COUNTY, Colo. (KCNC/ABC News )– Investigators in Colorado are trying to determine whether a murder there may have ties to the Delphi double homicide.

Bicyclist Tim Watkins was shot to death on a Colorado trail two weeks ago. There is speculation the murder could be connected to the deaths of Libby German and Abby Williams in February. However, investigators haven't been specific on what makes them think so.

Furthermore, another incident near the same trail where Watkins was shot has led to an arrest, which may also be connected. Police say 31-year-old Daniel Nations is in custody for allegedly threatening several people with a hatchet.

Authorities will not say if Nations is a suspect in Watkins death, but there are new concerns about him. Nations is a convicted sex offender. He was arrested in Colorado while driving a vehicle with expired Indiana license plates.

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