Friends of a Buford man killed in a motorcycle collision sought to conceal their involvement in an accident that has now been deemed vehicular homicide, authorities said Friday. Cpl. Jake Smith, spokesman for the Gwinnett County Police Department, said in a news release that five motorists were involved in a collision that killed 24-year-old Brandon Gaylor of Buford. The early morning April 26 accident as the friends were returning from a Flowery Branch restaurant was initially reported as a three-vehicle collision, police said.