Orlando Gunman Omar Mateen Bought $9,000 Worth of Jewelry Days Before Shooting

— -- Omar Mateen bought nearly $9,000 worth of jewelry less than a week before he killed 49 people at the Pulse nightclub in Orlando, Florida, ABC News has learned.

The purchase was made June 6 at the Kay Jewelers in Jensen Beach, Florida, which is near the Lotus Gun Shop where Mateen attempted to buy body armor.

Signet, which owns Kay Jewelers, would not confirm the purchase by Mateen, but issued a statement that they are "working closely with the authorities."

"Signet was shocked and deeply saddened by the violent acts against the LGBT community. We join all Americans in mourning and are working closely with the authorities. We will do everything possible to support them," Signet vice president David A. Bouffard said in a statement.

Investigators are still trying to piece together possible motives for the deadliest mass shooting in U.S. history.