A Suffolk man charged with multiple counts of sex crimes has been ruled incompetent to stand trial and will undergo treatment to attempt to restore him to competency.

Francis Marion Monahan Jr., 71, is charged with 78 counts of crimes including indecent liberties in a custodial relationship, indecent liberties with a child under 15 and aggravated sexual battery.

In Friday’s hearing, Circuit Court Judge Robert H. Sandwich Jr. ruled Monahan incompetent after reviewing a report. Monahan’s attorney and prosecutors both agreed it was the best solution.

“I know we’ve always had some concerns about Mr. Monahan’s situation,” Sandwich said.

The alleged incidents occurred between June 1993 and August 1997, according to a city press release at the time of his arrest in March.

The victim was between the ages of 8 and 13 at the time of the alleged offenses, according to the release.