Helicopters, sniffer dogs, SQ investigators, and more than 100 volunteers gathered in Lachute to comb the area for traces of Yvon Lacasse. 

A day after the arrest of the father of a boy who was the subject of an Amber Alert, the Surete du Quebec is still looking for the missing man, whose car was used in the alleged kidnapping.

Lacasse, 71, was the owner of the 2006 Honda CRV Fredette was driving when he was arrested. It was the third vehicle used by the 41-year-old father as he sought to avoid capture.

After finding the suspect's pick up truck  at a rest stop in Lachute, authorities believed that Lacasse could still be in the area. 

SQ spokesperson Claude Denis said Lacasse’s family is worried for his safety. It’s unclear how the suspect came to be in possession of Lacasse’s vehicle.

Denis also said that the SQ is working continuously with Lacasse's family, and that those who know him describe him as a quiet man who likes to work outdoors. 

"[Lacasse] is pretty active, he likes to keep working. He does a lot of the grass cutting and hedge-trimming-- doing quite a lot around the lake," Denis told CTV Montreal. 

Lacasse is 5’6” and weighs 155 lbs. He is bald with brown eyes. Anyone with information on his whereabouts is asked to call 911.