Editor's note: The story below includes details that some readers may find disturbing.

A southeast Iowa man was sentenced Monday to 120 years in prison after sexually abusing a girl from infancy to the age of 6, court records show.

Steven Douglas Crook Jr. of Bloomfield pleaded guilty to four counts of sexual exploitation of a child. The sentence is the maximum allowed for the crime, which includes violent sexual abuse, U.S. Attorney Marc Krickbaum said Tuesday in a news release.

The Davis County man at times would livestream the rape on a social media app, encouraging his followers to watch the abuse, according to release.

The young girl was rescued by law enforcement in March 2018, court records show. She was 6 years old at the time.

Authorities found electronic devices containing videos of the abuse in Crook's possession, according to a criminal complaint. One folder on a storage card was labeled "child porn and baby rape."

Crook told authorities he estimated the rape happened "less than 100 times," according to police records.

U.S. District Court Judge Stephanie M. Rose, who sentenced Crook, called his crime "horrific" and his actions "insidious" and "manipulative," according to the news release.

She justified what is essentially a life sentence by saying Crook remains "so very dangerous" to children.

Krickbaum encouraged anyone who suspects child abuse is occurring to contact law enforcement immediately.

Anna Spoerre is a breaking news reporter at the Des Moines Register. She can be reached by email at aspoerre@dmreg.com, by phone at 515-284-8387 or on Twitter at @annaspoerre. Support local news today by subscribing at DesMoinesRegister.com/Deal.