The man accused of attacking a woman at a Calgary transit stop before a bus driver scared off the suspect now faces five new charges, including a second count of sexual assault.

Chase Collier is also accused of harassing three local women and failing to comply with his bail conditions.

The new charges — which allegedly took place before the bus stop attack — were laid after Collier was arrested for aggravated sexual assault.

Police began looking at older, unsolved cases and found the circumstances of the second sexual assault to be similar to the first reported incident. The alleged victim was reportedly followed from a public transit stop.

The prosecution indicated Monday it is trying to have Collier tried for both sex assault charges at the same time, but defence lawyer Ben Leung opposes the move.

Police say a woman had just got off a bus at Sandstone Drive and Berkshire Boulevard N.W. when she was attacked in May. (CBC)

"He has a right to remain silent, even at trial," said Leung. "We want to make sure that if he chooses to testify in his own defence in one matter, he can do so while choosing to remain silent on the other matter."

In May, a woman had just got off a bus at Sandstone Drive and Berkshire Boulevard N.W. when she was attacked

Bus driver Amandeep Hunjan arrived just as the man forced the victim to the ground and attempted to continue the sexual assault, police said at the time.

After investigators announced they were looking for him, Collier surrendered to police.

Collier appeared in court on Monday and will be back Nov. 4 when lawyers will argue their positions on whether the sexual assault charges can be tried at the same time.