park, Grant finds a Velociraptor eggshell, seemingly proving Malcolm's earlier assertion that the dinosaurs have somehow been breeding against the geneticists' design. Meanwhile, the disgruntled chief programmer of Jurassic Park's controlling software, Dennis Nedry, attempts corporate espionage for Lewis Dodgson, a geneticist and agent of InGen's archrival, Biosyn. By activating a backdoor he wrote into the park's computer system, Nedry shuts down its security systems and steals frozen embryos for each of the park's fifteen species in an attempt to smuggle them out of the park. However, during Nedry's escape he gets lost due to a sudden tropical storm, and is killed by a Dilophosaurus. Without Nedry to reactivate the park's security, the electrified fences remain off and all the dinosaurs escape. The park's adult Tyrannosaurus attacks the guests on tour, with a juvenile T. rex killing Regis. In the aftermath, Grant and the children become lost in the park. Malcolm is gravely injured during the incident, but is found by Gennaro and Muldoon, and spends the remainder of the novel slowly dying as—between lucid lectures and morphine-induced rants—he tries to help the others understand their predicament and survive. The park's staff manages to temporarily get the park largely back in order, restoring the computer system by shutting down and restarting the power. When trying to restore the park to working order, they fail to notice that the system has been running on auxiliary power since the restart; this power soon runs out, shutting the park down a second time. The park's intelligent and aggressive Velociraptors escape their enclosure and kill Arnold along with Wu. Meanwhile, Grant and the children slowly make their way back to the Visitor Center by rafting down the jungle river, carrying news that several young raptors were on board the island's supply ship when it departed for the mainland. After the three return to the visitor's center, they are contacted by the others, who instruct Grant to switch on the park's generators. Tim is then able to reactivate the park's main power, allowing Gennaro to force the supply ship to return. Grant, Sattler, Muldoon, and Gennaro find the wild raptor nests and compare hatched eggs with the island's revised population tally, realizing the animals are leaving the island in an attempt at migration. Meanwhile, Hammond, taking a walk and contemplating building a new park that will improve on his previous mistakes, hears a T. rex