In an unusual instance of a sober driver facing penalties for causing a death, Brooklyn District Attorney Ken Thompson secured a manslaughter conviction for a crash that killed a second motorist.

Last January, days after Thompson took office, Jermaine Filmore ran a red light on Eastern Parkway and hit two other vehicles, according to WABC. One of those cars hit a fourth car and then caught fire. The driver of the vehicle that caught fire, a Lincoln Town Car, was killed.

Thompson filed a host of charges, and this week Filmore was convicted at trial of manslaughter, assault, reckless endangerment, reckless driving, speeding, and running a red light, according to court records. Manslaughter, the top charge, is a class C felony, with possible sentences ranging from probation to 15 years in prison.

It is extremely rare for a city district attorney to file a homicide charge against a motorist involved in a fatal crash unless the driver is also charged with DWI or DWAI. As Streetsblog has reported before, prosecutors seem more inclined to pursue serious charges when a driver’s recklessness is highly visible. But it’s virtually impossible to discern which crashes might merit a vigorous prosecution and which might result in a tap on the wrist or, as is virtually always the case, no criminal charges.

Motorists have killed over three dozen Brooklyn pedestrians and cyclists since Thompson succeeded former DA Charles Hynes, and his office is known to have filed homicide charges in only one case, against the man accused of the hit-and-run crash that killed 12-year-old Joie Sellers, and maimed her sister, last July.

Filmore is scheduled to be sentenced in January.