(Sparks, NV) — A 19-year-old man is behind bars in connection with a shooting at the Sparks Marina earlier this year. Investigators say Frank Hewitt shot four people on June 9th, leaving two in critical condition. Hewitt, a Reno resident, is facing four counts of attempted murder and several gun-related charges. The two men who were critically injured in the shooting have since been released from the hospital. Authorities have not announced a possible motive.