DENVER (CBS4) – A man wanted for rape, assault and robbery in Massachusetts and North Carolina has fled to Colorado and committed similar crimes here, Denver police said.

Gregory Lewis, 26, cut off his GPS ankle monitor and left it in the front yard of one of his alleged victims in Massachusetts before fleeing, police said.

Denver police said they believe Lewis — who is wanted for sexual assault on a child, kidnapping and aggravated robbery — is in the metro area.

“He’s a bad man,” police spokesman Sonny Jackson said. “He’s somebody we consider to be a sexual predator, someone we are concerned about being out in our community.”

The string of crimes began more than a month ago in Southbridge, Mass., and continued in Charlotte, police said.

Lewis was freed on bond when he left Massachusetts. In Charlotte, police believe he kidnapped, assaulted and robbed a woman.

“We’ve been in contact with those agencies as well to learn more about what they know about him, also sharing what we know about him,” Jackson said. “So hopefully, putting all our heads together, we can narrow some things down.”

Lewis is described as white, approximately 6 feet tall, 235 pounds with brown hair and eyes. He has a tattoo on his chest of a hand holding a knife with a broken handcuff, and a “demonic female with colored eyes,” police said, on his left shoulder to the elbow.

Police said they are not releasing information about where or when the attack happened in Denver out of respect for the victim.

In late September, investigators believe Lewis returned to a family home in Massachusetts where he then violently assaulted his stepfather, stole a 9 mm handgun and left with hundreds of rounds of ammunition.

“He is believed to be extremely dangerous,” Jackson said. “Do not approach him, do not contact him. Contact authorities right away.”