New York City police arrested a 27-year-old man in relation to the fatal stabbing of Katie Suarez, a Brooklyn runner. Suarez, 28, succumbed to her injuries three days after being attacked on Oct. 30. Sayed Mohassib, a Brooklyn resident and former Marine, was charged with second-degree murder and other offenses. He pleaded not guilty and was remanded without bail.

Mohassib, who worked briefly for the NYPD, was identified through surveillance footage. Although he and Suarez attended Brooklyn College, police found no evidence of a prior relationship. The motive remains unclear, and the attack is believed to be random. Suarez was running along Shore Parkway when she was attacked and suffered multiple stab wounds. Read more culture coverage.

Suarez, who worked at a TD Bank branch, was preparing to run a marathon with her mother. Her death has prompted calls for enhanced safety measures along the waterfront path. A vigil was held to honor her memory, attended by nearly 100 people. Related: Brooklyn Runner Katie Suarez Dies After Fatal Stabbing on Shore Parkway Greenway.

This original Runner World brief is based on reporting from Canadian Running. Visit the source for its complete reporting, context and any later corrections.