A baseball cap left in a Great Neck, N.Y., home during a break-in has now tied a suspect to the rape of a toddler in Texas, a savage hammer attack and to the recent rash of Long Island home invasions, Nassau County police announced Thursday.

After running DNA pulled from the hat through a national database, detectives discovered that the same man had viciously raped a toddler in Laredo, TX, in September 2009; and brutally beat a 52-year-old Long Island woman with a hammer in July, 2009.

According to police, the suspect, known only as "Marvin", is a 5-foot, 2-inch tall man from Honduras with short, dark hair, an injured hand and possibly a limp.

In July 2009, the suspect approached a Hempstead woman who was at a Home Depot trying to fix her leaky toilet. He told her he could fix it and she brought him back to her home where he worked for her that afternoon. However, when he was done, she complained that he didn't do a good job.

Incensed at her complaints, the man quickly became violent: "Inexplicably he becomes enraged and starts banging her over the head with a hammer repeatedly," said Nassau County Police Detective Ray Cote. The woman survived, but suffered multiple skull fractures and permanent neurological damage.

Thanks to the DNA records, the same man was connected to the rape of a 2-year-old girl in Laredo, Texas, who he reportedly raped and left for dead.

In the December break-in, the man crawled through the window of a young girl's room and placed a wet cloth over her face as she slept. He crawled on top of her, but the girl was able to escape and run to her mother's room. The man fled, but forgot a baseball cap in the girl's room. Police were later able to take a DNA sampling from the hat.

Nassau County police are warning that the suspect is very dangerous, and residents should be careful to secure the locks on all of their windows and doors.

Police have asked anyone with information about this crime, or anyone who can provide the identity of the subject, to contact them using their toll-free hotline: 1-800-244-TIPS (8477). All calls will be kept confidential. Crime Stoppers is offering a reward for information leading to an arrest.