The Loudoun County Sheriff's Office said that Edward A. Shortnacy, of Vienna, was identified as the suspect in the case after speaking with witnesses and coming to the realization that Shortnacy had been using the STRAVA fitness app during his ride on April 22.

WASHINGTON — Through a combination of witness interviews and the help of a fitness app, a suspect has been arrested in the April 22 assault of a bicyclist on the Washington and Old Dominion trail in Loudoun County.

The Loudoun County Sheriff’s Office said that 48-year-old Edward A. Shortnacy, of Vienna, was identified as the suspect in the case after speaking with witnesses and coming to the realization that Shortnacy had been using the STRAVA fitness app during his ride on April 22.

He was charged with malicious wounding. The sheriff’s office did not say how the app was used to identify Shortnacy.

The victim was riding in the center line while attempting to pass two other cyclists when Shortnacy, coming from the opposite direction, reached out and hit the victim’s helmet with his arm, a news release said.

The victim suffered serious injuries and was taken to a nearby hospital and later released.

Shortnacy turned himself in on Thursday morning. He has been released on a $5,000 unsecured bond.