The man wanted for at least five sexual assaults in Philadelphia this summer was arrested Wednesday in Montgomery County, Pennsylvania, according to police.

Police said 37-year-old Dynel Walker was wanted for five alleged sexual assaults between July 18 and Aug. 3 in Center City and South Philadelphia. Walker was arrested without incident at a Sam's Club store in Horsham, police said.

Walker has been charged in connection with three of the alleged assaults so far – one occurred on Aug. 2 and two on Aug. 3. According to the Philadelphia District Attorney's Office, Walker was charged with aggravated indecent assault, indecent assault, unlawful restraint and an assortment of misdemeanor charges related to the incidents. 

His bail is set at $1.5 million for the three incidents.

Police announced an investigation Monday into multiple reports of sexual assault in Center City and South Philly this summer.

According to police, five women reported a man with long braids sometimes worn in a ponytail approached them and allegedly sexually assaulted them. The incidents happened on the 1900 block of Spruce Street, 2000 block of Delancey Street, 1600 block of Waverly Street, 400 block of South 15th Street and 2500 block of Webster Street.

One victim told police the suspect said "good morning, beautiful," before allegedly groping her on July 18. Another victim said she was approached outside her apartment building when the suspect allegedly sexually assaulted her and pushed her to the ground the next day, police said.

On Aug. 2, a victim reported a man approaching her from behind, reaching over her shoulder and sexually assaulting her, police said.

On Aug. 3, another victim said a man came up from behind and sexually assaulted her, police said. Later that day, around 12:30 p.m., a victim was near her garage in South Philly when a suspect walked up from behind and sexually assaulted her, according to police.

"As someone who has lived through the trauma of sexual violence, I understand the fear, the isolation, and the weight of coming forward," said LaQuisha Anthony with the Philadelphia Center Against Sexual Violence. "It takes an extraordinary amount of strength to share your story, to endure a forensic exam, and to potentially face your perpetrator." 

During a press conference on Wednesday, Capt. Margo Alleyne, commanding officer of the Special Victims Unit, said police received one additional report that they believe Walker is responsible for — an attack around 2 a.m. on Aug. 3 near 17th and Lombard streets in which a woman said the suspect pushed her up against a vehicle. Alleyne said the woman was able to get away.

Alleyne said help from surveillance video, civilians and the media enabled police to identify and find the suspect. 

"Surveillance played a major role in this investigation, as well as the media, the media played a major role in this investigation," Alleyne said. "The citizens of Philadelphia and Horsham played a major role in this investigation."

Alleyne said an anonymous caller shared Walker's name after his photos were released, and police reached out to the victims to identify him as the suspect.

Police also received a tip that Walker was spotted in the Horsham area, Alleyne said.

Alleyne said police are working to see if Walker is responsible for other assaults that have been reported. Walker has been arrested about 21 times in the past for narcotics and theft charges, but he has no documented history of sex crimes, Alleyne said.

Investigators said Monday that they saw the assaults as escalating behavior. Police believe there could be more victims who have not come forward.

If you've been assaulted or you have information related to these assaults, you can contact the Victim Services Team at the district attorney's office.

How neighbor's security video helped ID suspect

Wednesday's news was a sigh of relief for neighbors on Waverly Street after police arrested the man they say is responsible for sexually assaulting at least five women.

Chris Lucero lives on Waverly Street and said his home security video helped police identify Walker. He said that after reviewing his security video, it didn't take long to realize what happened.

"It was pretty apparent. The timestamps all lined up with the description they gave of the victim going by and him following behind," Lucero said. "You could tell it was within a matter of seconds he was behind her."

Police said the video captures Walker walking down Waverly Street on Aug. 2 around 8:15 a.m., moments before he allegedly sexually assaulted a woman.

"We know who it is," Lucero said. "Just to see the response. It's been blasted out. The news has been doing their part. Everybody has been out looking, and we have raised our awareness as well."

Lucero said it wasn't until a friend sent him a screenshot of Walker from his neighbor's security camera and a news article that he realized something serious had happened.

"I think it shows the importance of what these cameras have done," Lucero said.

Mackenzie Lee told CBS News Philadelphia earlier this week that the news of the alleged attacks was deeply unsettling. On Wednesday, Lee said she's relieved police have the ID of the suspect.

"It's a good feeling to know that there is traction and happening, especially having a face to put to the name," Lee said. "The pictures were great to have, but they were a little blurry, so every person you passed, you were a little concerned. So, now to know exactly who it is definitely is helpful."