(AP) — Nebraska will again expand its ban on synthetic drugs under a new law, but some say the law doesn’t go far enough.

The law targets the newest generation of synthetic drugs that mimic the effects of marijuana. It was passed in the legislative session’s final day and signed by Gov. Dave Heineman last week.

Despite its passage, the law disappointed Steve Tucker, whose 18-year-old son, Billy, died in October from an overdose of the synthetic marijuana “K2.”

Tucker, of Greenwood, says the new law doesn’t stop substances developed recently in eastern Europe that will likely reach Nebraska soon.

Sen. Ken Schilz of Ogallala, who sponsored the bill, says some provision had to be removed from the bill in order for it to gain approval.