Tacoma, Wash. ? A man accused of a shooting spree at a crowded shopping mall told authorities to “just follow the screams” when he called them shortly before opening fire with a pair of assault rifles, according to court documents released Monday.

Plans for making bombs and poison gas were later found after a search of the man’s car and bedroom, prosecutors said. Dominick Sergio Maldonado, 20, was ordered held on $2 million bail after pleading innocent Monday to multiple charges that included first-degree assault.

According to the court documents, Maldonado told detectives he had been humiliated during a troubled childhood and that recent problems made him want to be “heard.”

Six people were injured, one critically, in Sunday’s attack. Maldonado surrendered about four hours after he ducked into a store and took four hostages, all of whom were released unharmed, authorities said.

In the documents, prosecutors said Maldonado, of Tacoma, denied intending to shoot anyone but wanted media attention.

Police said they got a call just before the shootings, with the caller saying he was armed and about to start firing. When the dispatcher asked the man where he was, he replied, “Just follow the screams,” the papers said.

Maldonado was charged with eight counts of first-degree assault, four counts of kidnapping, and two counts of unlawful possession of a firearm.

One person remained hospitalized Monday, a hospital spokesman said.