05/16/2014 08:07 EDT | Updated 07/16/2014 05:59 EDT

Yousef Hussein charged in Ottawa serial predator case

Ottawa police have charged a 25-year-old man, who was in Canada on an expired student visa, in six sexual assaults across the city that happened over a 14-month period.

Yousef Hussein, who also owned a small company called RJ Moving, is charged with six counts of sexual assault, three counts of overcoming resistance, two counts of breaking and entering and two counts of committing an indecent act.

Police sources said they were led to Hussein after a man living in the same west Ottawa apartment building called them after seeing a surveillance video police released in the winter.

Police then tracked the man and later searched his apartment. They also asked for suspects to come in for saliva samples and polygraph tests to narrow their suspect list, sources told CBC News.

A police source also said Hussein is married.

Victims between 18 and 30 years old

The sexual assault investigation originally linked three incidents involving victims between 18 and 30 years old, which happened between August 2012 and October 2013.

The first happened on Banner Road, a second in June 2013 between Erinbrook Crescent and Lancaster Road, and the third on Aldea Avenue. The three victims had been walking alone before they were attacked and they were choked, police said.

On Friday, Ottawa Police Chief Charles Bordeleau said Hussein is accused in each of those three incidents. Bordeleau also said police believe Hussein is responsible for three additional sexual assaults.

Those occurred in late March 2013 in the Greenbank Towers apartment building in the 2600 block of Draper Avenue, on June 1, 2013 on Laurier Avenue near Chapel Street and on Oct. 16, 2013 in the 2400 block of Baseline Road between Woodroffe Avenue and Greenbank Road.

In January, police said there could be as many as seven other cases linked to the same suspect, including a sexual assault in Barrhaven in January 2014. There are still four unsolved cases police continue to investigate.

Police said Hussein was arrested at his west Ottawa home late Thursday afternoon and he's expected to appear in court Friday afternoon.

Police said Hussein owned RJ Moving and he was living in Ottawa on an expired student visa. They have contacted Canada Border Services Agency.

Police released two sketches of a suspect and surveillance video from the Draper Ave. building this past winter to initiate a response from the public. They received several hundred tips as a result, including the one from the neighbour that led police to Hussein.

Police sources have said the confirmed cases are linked with DNA evidence.