The FBI has set up a website for people to send in tips as agents investigate two shootings at South Carolina State University.
A 19-year-old Saluda, South Carolina, woman was killed at a student housing complex last weekend.
Another person was hurt in the second shooting.
They are expected to recover.
Authorities arrested Matthew Daniel McCoy, 18, was charged with pointing and presenting a firearm and carrying a weapon on school property.
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