The police were aided by the public, which reported the offending vehicle's whereabouts, after its tag number and description were disseminated through the media. http://www.maryland-law.com/blog/baltimore-hit-and-run-tragically-kills-hopkins-student.cfm
The vehicle evidently belongs to a Carroll County, Maryland resident. Baltimore City police have the vehicle in custody and crime technicians are examining it for evidence of the hit and run and a determination as to who was operating it at the time.
The collision took place at 3:15 p.m. at the intersection of University Parkway and Saint Paul Street in Baltimore City.