HONOLULU -- Attorneys who are suing the Hilton Lagoon hotel showed dramatic video Wednesday that they said proves a lagoon pool drain is poorly designed and is still dangerous.

The hotel attracts many more swimmers after renovations that increased water circulation, but the huge drain that makes the circulation possible may also be deadly.

"I want them to fix it and fix it now," said Jacob Stock.

Stock's father, Bill, was paralyzed from the waist down nine years ago. A strong swimmer, lawyers said he was training in the lagoon on July 30 when his left foot was held by suction against a drainage grate.

"There were three people there instantaneously to help him free his leg and they could not do it," said family attorney Mark Davis. "It's very hard. I cannot even imagine what he was thinking when he was drowning."

Video was shot by investigators the day after the incident. It shows water being pulled into the flat grates. The suction was strong enough to hold a fish immobile.

Attorneys said the flat grate is also a violation of federal safety laws enacted while Hilton was renovating the Lagoon.

"That video is very hard to watch for me because that's where he died," Stock said.

In a statement, the Hilton said it cannot respond to pending litigation and it had not seen the lawsuit. The company did express its condolences to the Stock family.

Hilton previously said that the drains, which are disguised as rock formations, are not defective and meet state and county requirements. Hilton would not say if anything has changed since Bill Stock died.